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// SPDX-License-Identifier: GPL-2.0-or-later /* * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2007. / #include "dtc.h" #include "srcpos.h" #ifdef TRACE_CHECKS #define TRACE(c, ...) \ do { \ fprintf(stderr, "=== %s: ", (c)->name); \ fprintf(stderr, __VA_ARGS__); \ fprintf(stderr, "\n"); \ } while (0) #else #define TRACE(c, fmt, ...) do { } while (0) #endif enum checkstatus { UNCHECKED = 0, PREREQ, PASSED, FAILED, }; struct check; typedef void (check_fn)(struct check c, struct dt_info dti, struct node node); struct check { const char name; check_fn fn; void data; bool warn, error; enum checkstatus status; bool inprogress; int num_prereqs; struct check prereq; }; #define CHECK_ENTRY(nm_, fn_, d_, w_, e_, ...) \ static struct check nm_##_prereqs[] = { __VA_ARGS__ }; \ static struct check nm_ = { \ .name = #nm_, \ .fn = (fn_), \ .data = (d_), \ .warn = (w_), \ .error = (e_), \ .status = UNCHECKED, \ .num_prereqs = ARRAY_SIZE(nm_##_prereqs), \ .prereq = nm_##_prereqs, \ }; #define WARNING(nm_, fn_, d_, ...) \ CHECK_ENTRY(nm_, fn_, d_, true, false, __VA_ARGS__) #define ERROR(nm_, fn_, d_, ...) \ CHECK_ENTRY(nm_, fn_, d_, false, true, __VA_ARGS__) #define CHECK(nm_, fn_, d_, ...) \ CHECK_ENTRY(nm_, fn_, d_, false, false, __VA_ARGS__) static inline void PRINTF(5, 6) check_msg(struct check c, struct dt_info dti, struct node node, struct property prop, const char fmt, ...) { va_list ap; char str = NULL; struct srcpos pos = NULL; char file_str; if (!(c->warn && (quiet < 1)) && !(c->error && (quiet < 2))) return; if (prop && prop->srcpos) pos = prop->srcpos; else if (node && node->srcpos) pos = node->srcpos; if (pos) { file_str = srcpos_string(pos); xasprintf(&str, "%s", file_str); free(file_str); } else if (streq(dti->outname, "-")) { xasprintf(&str, "<stdout>"); } else { xasprintf(&str, "%s", dti->outname); } xasprintf_append(&str, ": %s (%s): ", (c->error) ? "ERROR" : "Warning", c->name); if (node) { if (prop) xasprintf_append(&str, "%s:%s: ", node->fullpath, prop->name); else xasprintf_append(&str, "%s: ", node->fullpath); } va_start(ap, fmt); xavsprintf_append(&str, fmt, ap); va_end(ap); xasprintf_append(&str, "\n"); if (!prop && pos) { pos = node->srcpos; while (pos->next) { pos = pos->next; file_str = srcpos_string(pos); xasprintf_append(&str, " also defined at %s\n", file_str); free(file_str); } } fputs(str, stderr); } #define FAIL(c, dti, node, ...) \ do { \ TRACE((c), "\t\tFAILED at %s:%d", __FILE__, __LINE__); \ (c)->status = FAILED; \ check_msg((c), dti, node, NULL, __VA_ARGS__); \ } while (0) #define FAIL_PROP(c, dti, node, prop, ...) \ do { \ TRACE((c), "\t\tFAILED at %s:%d", __FILE__, __LINE__); \ (c)->status = FAILED; \ check_msg((c), dti, node, prop, __VA_ARGS__); \ } while (0) static void check_nodes_props(struct check c, struct dt_info dti, struct node node) { struct node child; TRACE(c, "%s", node->fullpath); if (c->fn) c->fn(c, dti, node); for_each_child(node, child) check_nodes_props(c, dti, child); } static bool run_check(struct check c, struct dt_info dti) { struct node dt = dti->dt; bool error = false; int i; assert(!c->inprogress); if (c->status != UNCHECKED) goto out; c->inprogress = true; for (i = 0; i < c->num_prereqs; i++) { struct check prq = c->prereq[i]; error = error \|\| run_check(prq, dti); if (prq->status != PASSED) { c->status = PREREQ; check_msg(c, dti, NULL, NULL, "Failed prerequisite '%s'", c->prereq[i]->name); } } if (c->status != UNCHECKED) goto out; check_nodes_props(c, dti, dt); if (c->status == UNCHECKED) c->status = PASSED; TRACE(c, "\tCompleted, status %d", c->status); out: c->inprogress = false; if ((c->status != PASSED) && (c->error)) error = true; return error; } /* * Utility check functions / / A check which always fails, for testing purposes only / static inline void check_always_fail(struct check c, struct dt_info dti, struct node node) { FAIL(c, dti, node, "always_fail check"); } CHECK(always_fail, check_always_fail, NULL); static void check_is_string(struct check c, struct dt_info dti, struct node node) { struct property prop; char propname = c->data; prop = get_property(node, propname); if (!prop) return; / Not present, assumed ok / if (!data_is_one_string(prop->val)) FAIL_PROP(c, dti, node, prop, "property is not a string"); } #define WARNING_IF_NOT_STRING(nm, propname) \ WARNING(nm, check_is_string, (propname)) #define ERROR_IF_NOT_STRING(nm, propname) \ ERROR(nm, check_is_string, (propname)) static void check_is_string_list(struct check c, struct dt_info dti, struct node node) { int rem, l; struct property prop; char propname = c->data; char str; prop = get_property(node, propname); if (!prop) return; / Not present, assumed ok / str = prop->val.val; rem = prop->val.len; while (rem > 0) { l = strnlen(str, rem); if (l == rem) { FAIL_PROP(c, dti, node, prop, "property is not a string list"); break; } rem -= l + 1; str += l + 1; } } #define WARNING_IF_NOT_STRING_LIST(nm, propname) \ WARNING(nm, check_is_string_list, (propname)) #define ERROR_IF_NOT_STRING_LIST(nm, propname) \ ERROR(nm, check_is_string_list, (propname)) static void check_is_cell(struct check c, struct dt_info dti, struct node node) { struct property prop; char propname = c->data; prop = get_property(node, propname); if (!prop) return; /* Not present, assumed ok / if (prop->val.len != sizeof(cell_t)) FAIL_PROP(c, dti, node, prop, "property is not a single cell"); } #define WARNING_IF_NOT_CELL(nm, propname) \ WARNING(nm, check_is_cell, (propname)) #define ERROR_IF_NOT_CELL(nm, propname) \ ERROR(nm, check_is_cell, (propname)) / * Structural check functions / static void check_duplicate_node_names(struct check c, struct dt_info dti, struct node node) { struct node child, child2; for_each_child(node, child) for (child2 = child->next_sibling; child2; child2 = child2->next_sibling) if (streq(child->name, child2->name)) FAIL(c, dti, child2, "Duplicate node name"); } ERROR(duplicate_node_names, check_duplicate_node_names, NULL); static void check_duplicate_property_names(struct check c, struct dt_info dti, struct node node) { struct property prop, prop2; for_each_property(node, prop) { for (prop2 = prop->next; prop2; prop2 = prop2->next) { if (prop2->deleted) continue; if (streq(prop->name, prop2->name)) FAIL_PROP(c, dti, node, prop, "Duplicate property name"); } } } ERROR(duplicate_property_names, check_duplicate_property_names, NULL); #define LOWERCASE "abcdefghijklmnopqrstuvwxyz" #define UPPERCASE "ABCDEFGHIJKLMNOPQRSTUVWXYZ" #define DIGITS "0123456789" #define PROPNODECHARS LOWERCASE UPPERCASE DIGITS ",._+#?-" #define PROPNODECHARSSTRICT LOWERCASE UPPERCASE DIGITS ",-" static void check_node_name_chars(struct check c, struct dt_info dti, struct node node) { int n = strspn(node->name, c->data); if (n < strlen(node->name)) FAIL(c, dti, node, "Bad character '%c' in node name", node->name[n]); } ERROR(node_name_chars, check_node_name_chars, PROPNODECHARS "@"); static void check_node_name_chars_strict(struct check c, struct dt_info dti, struct node node) { int n = strspn(node->name, c->data); if (n < node->basenamelen) FAIL(c, dti, node, "Character '%c' not recommended in node name", node->name[n]); } CHECK(node_name_chars_strict, check_node_name_chars_strict, PROPNODECHARSSTRICT); static void check_node_name_format(struct check c, struct dt_info dti, struct node node) { if (strchr(get_unitname(node), '@')) FAIL(c, dti, node, "multiple '@' characters in node name"); } ERROR(node_name_format, check_node_name_format, NULL, &node_name_chars); static void check_unit_address_vs_reg(struct check c, struct dt_info dti, struct node node) { const char unitname = get_unitname(node); struct property prop = get_property(node, "reg"); if (get_subnode(node, "__overlay__")) { /* HACK: Overlay fragments are a special case / return; } if (!prop) { prop = get_property(node, "ranges"); if (prop && !prop->val.len) prop = NULL; } if (prop) { if (!unitname[0]) FAIL(c, dti, node, "node has a reg or ranges property, but no unit name"); } else { if (unitname[0]) FAIL(c, dti, node, "node has a unit name, but no reg property"); } } WARNING(unit_address_vs_reg, check_unit_address_vs_reg, NULL); static void check_property_name_chars(struct check c, struct dt_info dti, struct node node) { struct property prop; for_each_property(node, prop) { int n = strspn(prop->name, c->data); if (n < strlen(prop->name)) FAIL_PROP(c, dti, node, prop, "Bad character '%c' in property name", prop->name[n]); } } ERROR(property_name_chars, check_property_name_chars, PROPNODECHARS); static void check_property_name_chars_strict(struct check c, struct dt_info dti, struct node node) { struct property prop; for_each_property(node, prop) { const char name = prop->name; int n = strspn(name, c->data); if (n == strlen(prop->name)) continue; /* Certain names are whitelisted / if (streq(name, "device_type")) continue; / * # is only allowed at the beginning of property names not counting * the vendor prefix. / if (name[n] == '#' && ((n == 0) \|\| (name[n-1] == ','))) { name += n + 1; n = strspn(name, c->data); } if (n < strlen(name)) FAIL_PROP(c, dti, node, prop, "Character '%c' not recommended in property name", name[n]); } } CHECK(property_name_chars_strict, check_property_name_chars_strict, PROPNODECHARSSTRICT); #define DESCLABEL_FMT "%s%s%s%s%s" #define DESCLABEL_ARGS(node,prop,mark) \ ((mark) ? "value of " : ""), \ ((prop) ? "'" : ""), \ ((prop) ? (prop)->name : ""), \ ((prop) ? "' in " : ""), (node)->fullpath static void check_duplicate_label(struct check c, struct dt_info dti, const char label, struct node node, struct property prop, struct marker mark) { struct node dt = dti->dt; struct node othernode = NULL; struct property otherprop = NULL; struct marker othermark = NULL; othernode = get_node_by_label(dt, label); if (!othernode) otherprop = get_property_by_label(dt, label, &othernode); if (!othernode) othermark = get_marker_label(dt, label, &othernode, &otherprop); if (!othernode) return; if ((othernode != node) \|\| (otherprop != prop) \|\| (othermark != mark)) FAIL(c, dti, node, "Duplicate label '%s' on " DESCLABEL_FMT " and " DESCLABEL_FMT, label, DESCLABEL_ARGS(node, prop, mark), DESCLABEL_ARGS(othernode, otherprop, othermark)); } static void check_duplicate_label_node(struct check c, struct dt_info dti, struct node node) { struct label l; struct property prop; for_each_label(node->labels, l) check_duplicate_label(c, dti, l->label, node, NULL, NULL); for_each_property(node, prop) { struct marker m = prop->val.markers; for_each_label(prop->labels, l) check_duplicate_label(c, dti, l->label, node, prop, NULL); for_each_marker_of_type(m, LABEL) check_duplicate_label(c, dti, m->ref, node, prop, m); } } ERROR(duplicate_label, check_duplicate_label_node, NULL); static cell_t check_phandle_prop(struct check c, struct dt_info dti, struct node node, const char propname) { struct node root = dti->dt; struct property prop; struct marker m; cell_t phandle; prop = get_property(node, propname); if (!prop) return 0; if (prop->val.len != sizeof(cell_t)) { FAIL_PROP(c, dti, node, prop, "bad length (%d) %s property", prop->val.len, prop->name); return 0; } m = prop->val.markers; for_each_marker_of_type(m, REF_PHANDLE) { assert(m->offset == 0); if (node != get_node_by_ref(root, m->ref)) /* "Set this node's phandle equal to some * other node's phandle". That's nonsensical * by construction. / { FAIL(c, dti, node, "%s is a reference to another node", prop->name); } / But setting this node's phandle equal to its own * phandle is allowed - that means allocate a unique * phandle for this node, even if it's not otherwise * referenced. The value will be filled in later, so * we treat it as having no phandle data for now. / return 0; } phandle = propval_cell(prop); if ((phandle == 0) \|\| (phandle == -1)) { FAIL_PROP(c, dti, node, prop, "bad value (0x%x) in %s property", phandle, prop->name); return 0; } return phandle; } static void check_explicit_phandles(struct check c, struct dt_info dti, struct node node) { struct node root = dti->dt; struct node other; cell_t phandle, linux_phandle; /* Nothing should have assigned phandles yet / assert(!node->phandle); phandle = check_phandle_prop(c, dti, node, "phandle"); linux_phandle = check_phandle_prop(c, dti, node, "linux,phandle"); if (!phandle && !linux_phandle) / No valid phandles; nothing further to check / return; if (linux_phandle && phandle && (phandle != linux_phandle)) FAIL(c, dti, node, "mismatching 'phandle' and 'linux,phandle'" " properties"); if (linux_phandle && !phandle) phandle = linux_phandle; other = get_node_by_phandle(root, phandle); if (other && (other != node)) { FAIL(c, dti, node, "duplicated phandle 0x%x (seen before at %s)", phandle, other->fullpath); return; } node->phandle = phandle; } ERROR(explicit_phandles, check_explicit_phandles, NULL); static void check_name_properties(struct check c, struct dt_info dti, struct node node) { struct property *pp, prop = NULL; for (pp = &node->proplist; pp; pp = &((pp)->next)) if (streq((pp)->name, "name")) { prop = pp; break; } if (!prop) return; /* No name property, that's fine / if ((prop->val.len != node->basenamelen+1) \|\| (memcmp(prop->val.val, node->name, node->basenamelen) != 0)) { FAIL(c, dti, node, "\"name\" property is incorrect (\"%s\" instead" " of base node name)", prop->val.val); } else { / The name property is correct, and therefore redundant. * Delete it / pp = prop->next; free(prop->name); data_free(prop->val); free(prop); } } ERROR_IF_NOT_STRING(name_is_string, "name"); ERROR(name_properties, check_name_properties, NULL, &name_is_string); /* * Reference fixup functions / static void fixup_phandle_references(struct check c, struct dt_info dti, struct node node) { struct node dt = dti->dt; struct property prop; for_each_property(node, prop) { struct marker m = prop->val.markers; struct node refnode; cell_t phandle; for_each_marker_of_type(m, REF_PHANDLE) { assert(m->offset + sizeof(cell_t) <= prop->val.len); refnode = get_node_by_ref(dt, m->ref); if (! refnode) { if (!(dti->dtsflags & DTSF_PLUGIN)) FAIL(c, dti, node, "Reference to non-existent node or " "label \"%s\"\n", m->ref); else /* mark the entry as unresolved / ((fdt32_t )(prop->val.val + m->offset)) = cpu_to_fdt32(0xffffffff); continue; } phandle = get_node_phandle(dt, refnode); ((fdt32_t )(prop->val.val + m->offset)) = cpu_to_fdt32(phandle); reference_node(refnode); } } } ERROR(phandle_references, fixup_phandle_references, NULL, &duplicate_node_names, &explicit_phandles); static void fixup_path_references(struct check c, struct dt_info dti, struct node node) { struct node dt = dti->dt; struct property prop; for_each_property(node, prop) { struct marker m = prop->val.markers; struct node refnode; char path; for_each_marker_of_type(m, REF_PATH) { assert(m->offset <= prop->val.len); refnode = get_node_by_ref(dt, m->ref); if (!refnode) { FAIL(c, dti, node, "Reference to non-existent node or label \"%s\"\n", m->ref); continue; } path = refnode->fullpath; prop->val = data_insert_at_marker(prop->val, m, path, strlen(path) + 1); reference_node(refnode); } } } ERROR(path_references, fixup_path_references, NULL, &duplicate_node_names); static void fixup_omit_unused_nodes(struct check c, struct dt_info dti, struct node node) { if (generate_symbols && node->labels) return; if (node->omit_if_unused && !node->is_referenced) delete_node(node); } ERROR(omit_unused_nodes, fixup_omit_unused_nodes, NULL, &phandle_references, &path_references); /* * Semantic checks / WARNING_IF_NOT_CELL(address_cells_is_cell, "#address-cells"); WARNING_IF_NOT_CELL(size_cells_is_cell, "#size-cells"); WARNING_IF_NOT_CELL(interrupt_cells_is_cell, "#interrupt-cells"); WARNING_IF_NOT_STRING(device_type_is_string, "device_type"); WARNING_IF_NOT_STRING(model_is_string, "model"); WARNING_IF_NOT_STRING(status_is_string, "status"); WARNING_IF_NOT_STRING(label_is_string, "label"); WARNING_IF_NOT_STRING_LIST(compatible_is_string_list, "compatible"); static void check_names_is_string_list(struct check c, struct dt_info dti, struct node node) { struct property prop; for_each_property(node, prop) { const char s = strrchr(prop->name, '-'); if (!s \|\| !streq(s, "-names")) continue; c->data = prop->name; check_is_string_list(c, dti, node); } } WARNING(names_is_string_list, check_names_is_string_list, NULL); static void check_alias_paths(struct check c, struct dt_info dti, struct node node) { struct property prop; if (!streq(node->name, "aliases")) return; for_each_property(node, prop) { if (!prop->val.val \|\| !get_node_by_path(dti->dt, prop->val.val)) { FAIL_PROP(c, dti, node, prop, "aliases property is not a valid node (%s)", prop->val.val); continue; } if (strspn(prop->name, LOWERCASE DIGITS "-") != strlen(prop->name)) FAIL(c, dti, node, "aliases property name must include only lowercase and '-'"); } } WARNING(alias_paths, check_alias_paths, NULL); static void fixup_addr_size_cells(struct check c, struct dt_info dti, struct node node) { struct property prop; node->addr_cells = -1; node->size_cells = -1; prop = get_property(node, "#address-cells"); if (prop) node->addr_cells = propval_cell(prop); prop = get_property(node, "#size-cells"); if (prop) node->size_cells = propval_cell(prop); } WARNING(addr_size_cells, fixup_addr_size_cells, NULL, &address_cells_is_cell, &size_cells_is_cell); #define node_addr_cells(n) \ (((n)->addr_cells == -1) ? 2 : (n)->addr_cells) #define node_size_cells(n) \ (((n)->size_cells == -1) ? 1 : (n)->size_cells) static void check_reg_format(struct check c, struct dt_info dti, struct node node) { struct property prop; int addr_cells, size_cells, entrylen; prop = get_property(node, "reg"); if (!prop) return; /* No "reg", that's fine / if (!node->parent) { FAIL(c, dti, node, "Root node has a \"reg\" property"); return; } if (prop->val.len == 0) FAIL_PROP(c, dti, node, prop, "property is empty"); addr_cells = node_addr_cells(node->parent); size_cells = node_size_cells(node->parent); entrylen = (addr_cells + size_cells) sizeof(cell_t); if (!entrylen \|\| (prop->val.len % entrylen) != 0) FAIL_PROP(c, dti, node, prop, "property has invalid length (%d bytes) " "(#address-cells == %d, #size-cells == %d)", prop->val.len, addr_cells, size_cells); } WARNING(reg_format, check_reg_format, NULL, &addr_size_cells); static void check_ranges_format(struct check c, struct dt_info dti, struct node node) { struct property prop; int c_addr_cells, p_addr_cells, c_size_cells, p_size_cells, entrylen; prop = get_property(node, "ranges"); if (!prop) return; if (!node->parent) { FAIL_PROP(c, dti, node, prop, "Root node has a \"ranges\" property"); return; } p_addr_cells = node_addr_cells(node->parent); p_size_cells = node_size_cells(node->parent); c_addr_cells = node_addr_cells(node); c_size_cells = node_size_cells(node); entrylen = (p_addr_cells + c_addr_cells + c_size_cells) * sizeof(cell_t); if (prop->val.len == 0) { if (p_addr_cells != c_addr_cells) FAIL_PROP(c, dti, node, prop, "empty \"ranges\" property but its " "#address-cells (%d) differs from %s (%d)", c_addr_cells, node->parent->fullpath, p_addr_cells); if (p_size_cells != c_size_cells) FAIL_PROP(c, dti, node, prop, "empty \"ranges\" property but its " "#size-cells (%d) differs from %s (%d)", c_size_cells, node->parent->fullpath, p_size_cells); } else if ((prop->val.len % entrylen) != 0) { FAIL_PROP(c, dti, node, prop, "\"ranges\" property has invalid length (%d bytes) " "(parent #address-cells == %d, child #address-cells == %d, " "#size-cells == %d)", prop->val.len, p_addr_cells, c_addr_cells, c_size_cells); } } WARNING(ranges_format, check_ranges_format, NULL, &addr_size_cells); static const struct bus_type pci_bus = { .name = "PCI", }; static void check_pci_bridge(struct check c, struct dt_info dti, struct node node) { struct property prop; cell_t cells; prop = get_property(node, "device_type"); if (!prop \|\| !streq(prop->val.val, "pci")) return; node->bus = &pci_bus; if (!strprefixeq(node->name, node->basenamelen, "pci") && !strprefixeq(node->name, node->basenamelen, "pcie")) FAIL(c, dti, node, "node name is not \"pci\" or \"pcie\""); prop = get_property(node, "ranges"); if (!prop) FAIL(c, dti, node, "missing ranges for PCI bridge (or not a bridge)"); if (node_addr_cells(node) != 3) FAIL(c, dti, node, "incorrect #address-cells for PCI bridge"); if (node_size_cells(node) != 2) FAIL(c, dti, node, "incorrect #size-cells for PCI bridge"); prop = get_property(node, "bus-range"); if (!prop) return; if (prop->val.len != (sizeof(cell_t) 2)) { FAIL_PROP(c, dti, node, prop, "value must be 2 cells"); return; } cells = (cell_t )prop->val.val; if (fdt32_to_cpu(cells[0]) > fdt32_to_cpu(cells[1])) FAIL_PROP(c, dti, node, prop, "1st cell must be less than or equal to 2nd cell"); if (fdt32_to_cpu(cells[1]) > 0xff) FAIL_PROP(c, dti, node, prop, "maximum bus number must be less than 256"); } WARNING(pci_bridge, check_pci_bridge, NULL, &device_type_is_string, &addr_size_cells); static void check_pci_device_bus_num(struct check c, struct dt_info dti, struct node node) { struct property prop; unsigned int bus_num, min_bus, max_bus; cell_t cells; if (!node->parent \|\| (node->parent->bus != &pci_bus)) return; prop = get_property(node, "reg"); if (!prop) return; cells = (cell_t )prop->val.val; bus_num = (fdt32_to_cpu(cells[0]) & 0x00ff0000) >> 16; prop = get_property(node->parent, "bus-range"); if (!prop) { min_bus = max_bus = 0; } else { cells = (cell_t )prop->val.val; min_bus = fdt32_to_cpu(cells[0]); max_bus = fdt32_to_cpu(cells[0]); } if ((bus_num < min_bus) \|\| (bus_num > max_bus)) FAIL_PROP(c, dti, node, prop, "PCI bus number %d out of range, expected (%d - %d)", bus_num, min_bus, max_bus); } WARNING(pci_device_bus_num, check_pci_device_bus_num, NULL, &reg_format, &pci_bridge); static void check_pci_device_reg(struct check c, struct dt_info dti, struct node node) { struct property prop; const char unitname = get_unitname(node); char unit_addr[5]; unsigned int dev, func, reg; cell_t cells; if (!node->parent \|\| (node->parent->bus != &pci_bus)) return; prop = get_property(node, "reg"); if (!prop) { FAIL(c, dti, node, "missing PCI reg property"); return; } cells = (cell_t )prop->val.val; if (cells[1] \|\| cells[2]) FAIL_PROP(c, dti, node, prop, "PCI reg config space address cells 2 and 3 must be 0"); reg = fdt32_to_cpu(cells[0]); dev = (reg & 0xf800) >> 11; func = (reg & 0x700) >> 8; if (reg & 0xff000000) FAIL_PROP(c, dti, node, prop, "PCI reg address is not configuration space"); if (reg & 0x000000ff) FAIL_PROP(c, dti, node, prop, "PCI reg config space address register number must be 0"); if (func == 0) { snprintf(unit_addr, sizeof(unit_addr), "%x", dev); if (streq(unitname, unit_addr)) return; } snprintf(unit_addr, sizeof(unit_addr), "%x,%x", dev, func); if (streq(unitname, unit_addr)) return; FAIL(c, dti, node, "PCI unit address format error, expected \"%s\"", unit_addr); } WARNING(pci_device_reg, check_pci_device_reg, NULL, &reg_format, &pci_bridge); static const struct bus_type simple_bus = { .name = "simple-bus", }; static bool node_is_compatible(struct node node, const char compat) { struct property prop; const char str, end; prop = get_property(node, "compatible"); if (!prop) return false; for (str = prop->val.val, end = str + prop->val.len; str < end; str += strnlen(str, end - str) + 1) { if (streq(str, compat)) return true; } return false; } static void check_simple_bus_bridge(struct check c, struct dt_info dti, struct node node) { if (node_is_compatible(node, "simple-bus")) node->bus = &simple_bus; } WARNING(simple_bus_bridge, check_simple_bus_bridge, NULL, &addr_size_cells, &compatible_is_string_list); static void check_simple_bus_reg(struct check c, struct dt_info dti, struct node node) { struct property prop; const char unitname = get_unitname(node); char unit_addr[17]; unsigned int size; uint64_t reg = 0; cell_t cells = NULL; if (!node->parent \|\| (node->parent->bus != &simple_bus)) return; prop = get_property(node, "reg"); if (prop) cells = (cell_t )prop->val.val; else { prop = get_property(node, "ranges"); if (prop && prop->val.len) /* skip of child address / cells = ((cell_t )prop->val.val) + node_addr_cells(node); } if (!cells) { if (node->parent->parent && !(node->bus == &simple_bus)) FAIL(c, dti, node, "missing or empty reg/ranges property"); return; } size = node_addr_cells(node->parent); while (size--) reg = (reg << 32) \| fdt32_to_cpu((cells++)); snprintf(unit_addr, sizeof(unit_addr), "%"PRIx64, reg); if (!streq(unitname, unit_addr)) FAIL(c, dti, node, "simple-bus unit address format error, expected \"%s\"", unit_addr); } WARNING(simple_bus_reg, check_simple_bus_reg, NULL, &reg_format, &simple_bus_bridge); static const struct bus_type i2c_bus = { .name = "i2c-bus", }; static void check_i2c_bus_bridge(struct check c, struct dt_info dti, struct node node) { if (strprefixeq(node->name, node->basenamelen, "i2c-bus") \|\| strprefixeq(node->name, node->basenamelen, "i2c-arb")) { node->bus = &i2c_bus; } else if (strprefixeq(node->name, node->basenamelen, "i2c")) { struct node child; for_each_child(node, child) { if (strprefixeq(child->name, node->basenamelen, "i2c-bus")) return; } node->bus = &i2c_bus; } else return; if (!node->children) return; if (node_addr_cells(node) != 1) FAIL(c, dti, node, "incorrect #address-cells for I2C bus"); if (node_size_cells(node) != 0) FAIL(c, dti, node, "incorrect #size-cells for I2C bus"); } WARNING(i2c_bus_bridge, check_i2c_bus_bridge, NULL, &addr_size_cells); static void check_i2c_bus_reg(struct check c, struct dt_info dti, struct node node) { struct property prop; const char unitname = get_unitname(node); char unit_addr[17]; uint32_t reg = 0; int len; cell_t cells = NULL; if (!node->parent \|\| (node->parent->bus != &i2c_bus)) return; prop = get_property(node, "reg"); if (prop) cells = (cell_t )prop->val.val; if (!cells) { FAIL(c, dti, node, "missing or empty reg property"); return; } reg = fdt32_to_cpu(cells); snprintf(unit_addr, sizeof(unit_addr), "%x", reg); if (!streq(unitname, unit_addr)) FAIL(c, dti, node, "I2C bus unit address format error, expected \"%s\"", unit_addr); for (len = prop->val.len; len > 0; len -= 4) { reg = fdt32_to_cpu((cells++)); if (reg > 0x3ff) FAIL_PROP(c, dti, node, prop, "I2C address must be less than 10-bits, got \"0x%x\"", reg); } } WARNING(i2c_bus_reg, check_i2c_bus_reg, NULL, &reg_format, &i2c_bus_bridge); static const struct bus_type spi_bus = { .name = "spi-bus", }; static void check_spi_bus_bridge(struct check c, struct dt_info dti, struct node node) { int spi_addr_cells = 1; if (strprefixeq(node->name, node->basenamelen, "spi")) { node->bus = &spi_bus; } else { / Try to detect SPI buses which don't have proper node name / struct node child; if (node_addr_cells(node) != 1 \|\| node_size_cells(node) != 0) return; for_each_child(node, child) { struct property prop; for_each_property(child, prop) { if (strprefixeq(prop->name, 4, "spi-")) { node->bus = &spi_bus; break; } } if (node->bus == &spi_bus) break; } if (node->bus == &spi_bus && get_property(node, "reg")) FAIL(c, dti, node, "node name for SPI buses should be 'spi'"); } if (node->bus != &spi_bus \|\| !node->children) return; if (get_property(node, "spi-slave")) spi_addr_cells = 0; if (node_addr_cells(node) != spi_addr_cells) FAIL(c, dti, node, "incorrect #address-cells for SPI bus"); if (node_size_cells(node) != 0) FAIL(c, dti, node, "incorrect #size-cells for SPI bus"); } WARNING(spi_bus_bridge, check_spi_bus_bridge, NULL, &addr_size_cells); static void check_spi_bus_reg(struct check c, struct dt_info dti, struct node node) { struct property prop; const char unitname = get_unitname(node); char unit_addr[9]; uint32_t reg = 0; cell_t cells = NULL; if (!node->parent \|\| (node->parent->bus != &spi_bus)) return; if (get_property(node->parent, "spi-slave")) return; prop = get_property(node, "reg"); if (prop) cells = (cell_t )prop->val.val; if (!cells) { FAIL(c, dti, node, "missing or empty reg property"); return; } reg = fdt32_to_cpu(cells); snprintf(unit_addr, sizeof(unit_addr), "%x", reg); if (!streq(unitname, unit_addr)) FAIL(c, dti, node, "SPI bus unit address format error, expected \"%s\"", unit_addr); } WARNING(spi_bus_reg, check_spi_bus_reg, NULL, &reg_format, &spi_bus_bridge); static void check_unit_address_format(struct check c, struct dt_info dti, struct node node) { const char unitname = get_unitname(node); if (node->parent && node->parent->bus) return; if (!unitname[0]) return; if (!strncmp(unitname, "0x", 2)) { FAIL(c, dti, node, "unit name should not have leading \"0x\""); / skip over 0x for next test / unitname += 2; } if (unitname[0] == '0' && isxdigit(unitname[1])) FAIL(c, dti, node, "unit name should not have leading 0s"); } WARNING(unit_address_format, check_unit_address_format, NULL, &node_name_format, &pci_bridge, &simple_bus_bridge); / * Style checks / static void check_avoid_default_addr_size(struct check c, struct dt_info dti, struct node node) { struct property reg, ranges; if (!node->parent) return; /* Ignore root node / reg = get_property(node, "reg"); ranges = get_property(node, "ranges"); if (!reg && !ranges) return; if (node->parent->addr_cells == -1) FAIL(c, dti, node, "Relying on default #address-cells value"); if (node->parent->size_cells == -1) FAIL(c, dti, node, "Relying on default #size-cells value"); } WARNING(avoid_default_addr_size, check_avoid_default_addr_size, NULL, &addr_size_cells); static void check_avoid_unnecessary_addr_size(struct check c, struct dt_info dti, struct node node) { struct property prop; struct node child; bool has_reg = false; if (!node->parent \|\| node->addr_cells < 0 \|\| node->size_cells < 0) return; if (get_property(node, "ranges") \|\| !node->children) return; for_each_child(node, child) { prop = get_property(child, "reg"); if (prop) has_reg = true; } if (!has_reg) FAIL(c, dti, node, "unnecessary #address-cells/#size-cells without \"ranges\" or child \"reg\" property"); } WARNING(avoid_unnecessary_addr_size, check_avoid_unnecessary_addr_size, NULL, &avoid_default_addr_size); static bool node_is_disabled(struct node node) { struct property prop; prop = get_property(node, "status"); if (prop) { char str = prop->val.val; if (streq("disabled", str)) return true; } return false; } static void check_unique_unit_address_common(struct check c, struct dt_info dti, struct node node, bool disable_check) { struct node childa; if (node->addr_cells < 0 \|\| node->size_cells < 0) return; if (!node->children) return; for_each_child(node, childa) { struct node childb; const char addr_a = get_unitname(childa); if (!strlen(addr_a)) continue; if (disable_check && node_is_disabled(childa)) continue; for_each_child(node, childb) { const char addr_b = get_unitname(childb); if (childa == childb) break; if (disable_check && node_is_disabled(childb)) continue; if (streq(addr_a, addr_b)) FAIL(c, dti, childb, "duplicate unit-address (also used in node %s)", childa->fullpath); } } } static void check_unique_unit_address(struct check c, struct dt_info dti, struct node node) { check_unique_unit_address_common(c, dti, node, false); } WARNING(unique_unit_address, check_unique_unit_address, NULL, &avoid_default_addr_size); static void check_unique_unit_address_if_enabled(struct check c, struct dt_info dti, struct node node) { check_unique_unit_address_common(c, dti, node, true); } CHECK_ENTRY(unique_unit_address_if_enabled, check_unique_unit_address_if_enabled, NULL, false, false, &avoid_default_addr_size); static void check_obsolete_chosen_interrupt_controller(struct check c, struct dt_info dti, struct node node) { struct node dt = dti->dt; struct node chosen; struct property prop; if (node != dt) return; chosen = get_node_by_path(dt, "/chosen"); if (!chosen) return; prop = get_property(chosen, "interrupt-controller"); if (prop) FAIL_PROP(c, dti, node, prop, "/chosen has obsolete \"interrupt-controller\" property"); } WARNING(obsolete_chosen_interrupt_controller, check_obsolete_chosen_interrupt_controller, NULL); static void check_chosen_node_is_root(struct check c, struct dt_info dti, struct node node) { if (!streq(node->name, "chosen")) return; if (node->parent != dti->dt) FAIL(c, dti, node, "chosen node must be at root node"); } WARNING(chosen_node_is_root, check_chosen_node_is_root, NULL); static void check_chosen_node_bootargs(struct check c, struct dt_info dti, struct node node) { struct property prop; if (!streq(node->name, "chosen")) return; prop = get_property(node, "bootargs"); if (!prop) return; c->data = prop->name; check_is_string(c, dti, node); } WARNING(chosen_node_bootargs, check_chosen_node_bootargs, NULL); static void check_chosen_node_stdout_path(struct check c, struct dt_info dti, struct node node) { struct property prop; if (!streq(node->name, "chosen")) return; prop = get_property(node, "stdout-path"); if (!prop) { prop = get_property(node, "linux,stdout-path"); if (!prop) return; FAIL_PROP(c, dti, node, prop, "Use 'stdout-path' instead"); } c->data = prop->name; check_is_string(c, dti, node); } WARNING(chosen_node_stdout_path, check_chosen_node_stdout_path, NULL); struct provider { const char prop_name; const char cell_name; bool optional; }; static void check_property_phandle_args(struct check c, struct dt_info dti, struct node node, struct property prop, const struct provider provider) { struct node root = dti->dt; int cell, cellsize = 0; if (prop->val.len % sizeof(cell_t)) { FAIL_PROP(c, dti, node, prop, "property size (%d) is invalid, expected multiple of %zu", prop->val.len, sizeof(cell_t)); return; } for (cell = 0; cell < prop->val.len / sizeof(cell_t); cell += cellsize + 1) { struct node provider_node; struct property cellprop; int phandle; phandle = propval_cell_n(prop, cell); / * Some bindings use a cell value 0 or -1 to skip over optional * entries when each index position has a specific definition. / if (phandle == 0 \|\| phandle == -1) { / Give up if this is an overlay with external references / if (dti->dtsflags & DTSF_PLUGIN) break; cellsize = 0; continue; } / If we have markers, verify the current cell is a phandle / if (prop->val.markers) { struct marker m = prop->val.markers; for_each_marker_of_type(m, REF_PHANDLE) { if (m->offset == (cell * sizeof(cell_t))) break; } if (!m) FAIL_PROP(c, dti, node, prop, "cell %d is not a phandle reference", cell); } provider_node = get_node_by_phandle(root, phandle); if (!provider_node) { FAIL_PROP(c, dti, node, prop, "Could not get phandle node for (cell %d)", cell); break; } cellprop = get_property(provider_node, provider->cell_name); if (cellprop) { cellsize = propval_cell(cellprop); } else if (provider->optional) { cellsize = 0; } else { FAIL(c, dti, node, "Missing property '%s' in node %s or bad phandle (referred from %s[%d])", provider->cell_name, provider_node->fullpath, prop->name, cell); break; } if (prop->val.len < ((cell + cellsize + 1) * sizeof(cell_t))) { FAIL_PROP(c, dti, node, prop, "property size (%d) too small for cell size %d", prop->val.len, cellsize); } } } static void check_provider_cells_property(struct check c, struct dt_info dti, struct node node) { struct provider provider = c->data; struct property prop; prop = get_property(node, provider->prop_name); if (!prop) return; check_property_phandle_args(c, dti, node, prop, provider); } #define WARNING_PROPERTY_PHANDLE_CELLS(nm, propname, cells_name, ...) \ static struct provider nm##_provider = { (propname), (cells_name), __VA_ARGS__ }; \ WARNING(nm##_property, check_provider_cells_property, &nm##_provider, &phandle_references); WARNING_PROPERTY_PHANDLE_CELLS(clocks, "clocks", "#clock-cells"); WARNING_PROPERTY_PHANDLE_CELLS(cooling_device, "cooling-device", "#cooling-cells"); WARNING_PROPERTY_PHANDLE_CELLS(dmas, "dmas", "#dma-cells"); WARNING_PROPERTY_PHANDLE_CELLS(hwlocks, "hwlocks", "#hwlock-cells"); WARNING_PROPERTY_PHANDLE_CELLS(interrupts_extended, "interrupts-extended", "#interrupt-cells"); WARNING_PROPERTY_PHANDLE_CELLS(io_channels, "io-channels", "#io-channel-cells"); WARNING_PROPERTY_PHANDLE_CELLS(iommus, "iommus", "#iommu-cells"); WARNING_PROPERTY_PHANDLE_CELLS(mboxes, "mboxes", "#mbox-cells"); WARNING_PROPERTY_PHANDLE_CELLS(msi_parent, "msi-parent", "#msi-cells", true); WARNING_PROPERTY_PHANDLE_CELLS(mux_controls, "mux-controls", "#mux-control-cells"); WARNING_PROPERTY_PHANDLE_CELLS(phys, "phys", "#phy-cells"); WARNING_PROPERTY_PHANDLE_CELLS(power_domains, "power-domains", "#power-domain-cells"); WARNING_PROPERTY_PHANDLE_CELLS(pwms, "pwms", "#pwm-cells"); WARNING_PROPERTY_PHANDLE_CELLS(resets, "resets", "#reset-cells"); WARNING_PROPERTY_PHANDLE_CELLS(sound_dai, "sound-dai", "#sound-dai-cells"); WARNING_PROPERTY_PHANDLE_CELLS(thermal_sensors, "thermal-sensors", "#thermal-sensor-cells"); static bool prop_is_gpio(struct property prop) { char str; / * -gpios and -gpio can appear in property names, * so skip over any false matches (only one known ATM) / if (strstr(prop->name, "nr-gpio")) return false; str = strrchr(prop->name, '-'); if (str) str++; else str = prop->name; if (!(streq(str, "gpios") \|\| streq(str, "gpio"))) return false; return true; } static void check_gpios_property(struct check c, struct dt_info dti, struct node node) { struct property prop; / Skip GPIO hog nodes which have 'gpios' property / if (get_property(node, "gpio-hog")) return; for_each_property(node, prop) { struct provider provider; if (!prop_is_gpio(prop)) continue; provider.prop_name = prop->name; provider.cell_name = "#gpio-cells"; provider.optional = false; check_property_phandle_args(c, dti, node, prop, &provider); } } WARNING(gpios_property, check_gpios_property, NULL, &phandle_references); static void check_deprecated_gpio_property(struct check c, struct dt_info dti, struct node node) { struct property prop; for_each_property(node, prop) { char str; if (!prop_is_gpio(prop)) continue; str = strstr(prop->name, "gpio"); if (!streq(str, "gpio")) continue; FAIL_PROP(c, dti, node, prop, "'[-]gpio' is deprecated, use '[-]gpios' instead"); } } CHECK(deprecated_gpio_property, check_deprecated_gpio_property, NULL); static bool node_is_interrupt_provider(struct node node) { struct property prop; prop = get_property(node, "interrupt-controller"); if (prop) return true; prop = get_property(node, "interrupt-map"); if (prop) return true; return false; } static void check_interrupts_property(struct check c, struct dt_info dti, struct node node) { struct node root = dti->dt; struct node irq_node = NULL, parent = node; struct property irq_prop, prop = NULL; int irq_cells, phandle; irq_prop = get_property(node, "interrupts"); if (!irq_prop) return; if (irq_prop->val.len % sizeof(cell_t)) FAIL_PROP(c, dti, node, irq_prop, "size (%d) is invalid, expected multiple of %zu", irq_prop->val.len, sizeof(cell_t)); while (parent && !prop) { if (parent != node && node_is_interrupt_provider(parent)) { irq_node = parent; break; } prop = get_property(parent, "interrupt-parent"); if (prop) { phandle = propval_cell(prop); if ((phandle == 0) \|\| (phandle == -1)) { /* Give up if this is an overlay with * external references / if (dti->dtsflags & DTSF_PLUGIN) return; FAIL_PROP(c, dti, parent, prop, "Invalid phandle"); continue; } irq_node = get_node_by_phandle(root, phandle); if (!irq_node) { FAIL_PROP(c, dti, parent, prop, "Bad phandle"); return; } if (!node_is_interrupt_provider(irq_node)) FAIL(c, dti, irq_node, "Missing interrupt-controller or interrupt-map property"); break; } parent = parent->parent; } if (!irq_node) { FAIL(c, dti, node, "Missing interrupt-parent"); return; } prop = get_property(irq_node, "#interrupt-cells"); if (!prop) { FAIL(c, dti, irq_node, "Missing #interrupt-cells in interrupt-parent"); return; } irq_cells = propval_cell(prop); if (irq_prop->val.len % (irq_cells sizeof(cell_t))) { FAIL_PROP(c, dti, node, prop, "size is (%d), expected multiple of %d", irq_prop->val.len, (int)(irq_cells * sizeof(cell_t))); } } WARNING(interrupts_property, check_interrupts_property, &phandle_references); static const struct bus_type graph_port_bus = { .name = "graph-port", }; static const struct bus_type graph_ports_bus = { .name = "graph-ports", }; static void check_graph_nodes(struct check c, struct dt_info dti, struct node node) { struct node child; for_each_child(node, child) { if (!(strprefixeq(child->name, child->basenamelen, "endpoint") \|\| get_property(child, "remote-endpoint"))) continue; node->bus = &graph_port_bus; /* The parent of 'port' nodes can be either 'ports' or a device / if (!node->parent->bus && (streq(node->parent->name, "ports") \|\| get_property(node, "reg"))) node->parent->bus = &graph_ports_bus; break; } } WARNING(graph_nodes, check_graph_nodes, NULL); static void check_graph_child_address(struct check c, struct dt_info dti, struct node node) { int cnt = 0; struct node child; if (node->bus != &graph_ports_bus && node->bus != &graph_port_bus) return; for_each_child(node, child) { struct property prop = get_property(child, "reg"); /* No error if we have any non-zero unit address / if (prop && propval_cell(prop) != 0) return; cnt++; } if (cnt == 1 && node->addr_cells != -1) FAIL(c, dti, node, "graph node has single child node '%s', #address-cells/#size-cells are not necessary", node->children->name); } WARNING(graph_child_address, check_graph_child_address, NULL, &graph_nodes); static void check_graph_reg(struct check c, struct dt_info dti, struct node node) { char unit_addr[9]; const char unitname = get_unitname(node); struct property prop; prop = get_property(node, "reg"); if (!prop \|\| !unitname) return; if (!(prop->val.val && prop->val.len == sizeof(cell_t))) { FAIL(c, dti, node, "graph node malformed 'reg' property"); return; } snprintf(unit_addr, sizeof(unit_addr), "%x", propval_cell(prop)); if (!streq(unitname, unit_addr)) FAIL(c, dti, node, "graph node unit address error, expected \"%s\"", unit_addr); if (node->parent->addr_cells != 1) FAIL_PROP(c, dti, node, get_property(node, "#address-cells"), "graph node '#address-cells' is %d, must be 1", node->parent->addr_cells); if (node->parent->size_cells != 0) FAIL_PROP(c, dti, node, get_property(node, "#size-cells"), "graph node '#size-cells' is %d, must be 0", node->parent->size_cells); } static void check_graph_port(struct check c, struct dt_info dti, struct node node) { if (node->bus != &graph_port_bus) return; if (!strprefixeq(node->name, node->basenamelen, "port")) FAIL(c, dti, node, "graph port node name should be 'port'"); check_graph_reg(c, dti, node); } WARNING(graph_port, check_graph_port, NULL, &graph_nodes); static struct node get_remote_endpoint(struct check c, struct dt_info dti, struct node endpoint) { int phandle; struct node node; struct property prop; prop = get_property(endpoint, "remote-endpoint"); if (!prop) return NULL; phandle = propval_cell(prop); / Give up if this is an overlay with external references / if (phandle == 0 \|\| phandle == -1) return NULL; node = get_node_by_phandle(dti->dt, phandle); if (!node) FAIL_PROP(c, dti, endpoint, prop, "graph phandle is not valid"); return node; } static void check_graph_endpoint(struct check c, struct dt_info dti, struct node node) { struct node remote_node; if (!node->parent \|\| node->parent->bus != &graph_port_bus) return; if (!strprefixeq(node->name, node->basenamelen, "endpoint")) FAIL(c, dti, node, "graph endpoint node name should be 'endpoint'"); check_graph_reg(c, dti, node); remote_node = get_remote_endpoint(c, dti, node); if (!remote_node) return; if (get_remote_endpoint(c, dti, remote_node) != node) FAIL(c, dti, node, "graph connection to node '%s' is not bidirectional", remote_node->fullpath); } WARNING(graph_endpoint, check_graph_endpoint, NULL, &graph_nodes); static struct check check_table[] = { &duplicate_node_names, &duplicate_property_names, &node_name_chars, &node_name_format, &property_name_chars, &name_is_string, &name_properties, &duplicate_label, &explicit_phandles, &phandle_references, &path_references, &omit_unused_nodes, &address_cells_is_cell, &size_cells_is_cell, &interrupt_cells_is_cell, &device_type_is_string, &model_is_string, &status_is_string, &label_is_string, &compatible_is_string_list, &names_is_string_list, &property_name_chars_strict, &node_name_chars_strict, &addr_size_cells, &reg_format, &ranges_format, &unit_address_vs_reg, &unit_address_format, &pci_bridge, &pci_device_reg, &pci_device_bus_num, &simple_bus_bridge, &simple_bus_reg, &i2c_bus_bridge, &i2c_bus_reg, &spi_bus_bridge, &spi_bus_reg, &avoid_default_addr_size, &avoid_unnecessary_addr_size, &unique_unit_address, &unique_unit_address_if_enabled, &obsolete_chosen_interrupt_controller, &chosen_node_is_root, &chosen_node_bootargs, &chosen_node_stdout_path, &clocks_property, &cooling_device_property, &dmas_property, &hwlocks_property, &interrupts_extended_property, &io_channels_property, &iommus_property, &mboxes_property, &msi_parent_property, &mux_controls_property, &phys_property, &power_domains_property, &pwms_property, &resets_property, &sound_dai_property, &thermal_sensors_property, &deprecated_gpio_property, &gpios_property, &interrupts_property, &alias_paths, &graph_nodes, &graph_child_address, &graph_port, &graph_endpoint, &always_fail, }; static void enable_warning_error(struct check c, bool warn, bool error) { int i; / Raising level, also raise it for prereqs / if ((warn && !c->warn) \|\| (error && !c->error)) for (i = 0; i < c->num_prereqs; i++) enable_warning_error(c->prereq[i], warn, error); c->warn = c->warn \|\| warn; c->error = c->error \|\| error; } static void disable_warning_error(struct check c, bool warn, bool error) { int i; /* Lowering level, also lower it for things this is the prereq * for / if ((warn && c->warn) \|\| (error && c->error)) { for (i = 0; i < ARRAY_SIZE(check_table); i++) { struct check cc = check_table[i]; int j; for (j = 0; j < cc->num_prereqs; j++) if (cc->prereq[j] == c) disable_warning_error(cc, warn, error); } } c->warn = c->warn && !warn; c->error = c->error && !error; } void parse_checks_option(bool warn, bool error, const char arg) { int i; const char name = arg; bool enable = true; if ((strncmp(arg, "no-", 3) == 0) \|\| (strncmp(arg, "no_", 3) == 0)) { name = arg + 3; enable = false; } for (i = 0; i < ARRAY_SIZE(check_table); i++) { struct check c = check_table[i]; if (streq(c->name, name)) { if (enable) enable_warning_error(c, warn, error); else disable_warning_error(c, warn, error); return; } } die("Unrecognized check name \"%s\"\n", name); } void process_checks(bool force, struct dt_info dti) { int i; int error = 0; for (i = 0; i < ARRAY_SIZE(check_table); i++) { struct check *c = check_table[i]; if (c->warn \|\| c->error) error = error \|\| run_check(c, dti); } if (error) { if (!force) { fprintf(stderr, "ERROR: Input tree has errors, aborting " "(use -f to force output)\n"); exit(2); } else if (quiet < 3) { fprintf(stderr, "Warning: Input tree has errors, " "output forced\n"); } } }

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