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intel_bios_reader: add size temp variable as a shorthand for finfo.st_size

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Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Jani Nikula 2013-10-08 21:15:26 +03:00 committed by Rodrigo Vivi
parent 58ac17d821
commit 8596a4b886
1 changed files with 24 additions and 22 deletions
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46
tools/intel_bios_reader.c
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@ -835,6 +835,7 @@ int main(int argc, char **argv)
int vbt_off, bdb_off, i; int vbt_off, bdb_off, i;
const char *filename = "bios"; const char *filename = "bios";
struct stat finfo; struct stat finfo;
int size;
struct bdb_block *block; struct bdb_block *block;
char signature[17]; char signature[17];
char *devid_string; char *devid_string;
@ -860,12 +861,13 @@ int main(int argc, char **argv)
strerror(errno)); strerror(errno));
return 1; return 1;
} }
size = finfo.st_size;
if (finfo.st_size == 0) { if (size == 0) {
int len = 0, ret; int len = 0, ret;
finfo.st_size = 8192; size = 8192;
VBIOS = malloc (finfo.st_size); VBIOS = malloc (size);
while ((ret = read(fd, VBIOS + len, finfo.st_size - len))) { while ((ret = read(fd, VBIOS + len, size - len))) {
if (ret < 0) { if (ret < 0) {
printf("failed to read \"%s\": %s\n", filename, printf("failed to read \"%s\": %s\n", filename,
strerror(errno)); strerror(errno));
@ -873,13 +875,13 @@ int main(int argc, char **argv)
} }
len += ret; len += ret;
if (len == finfo.st_size) { if (len == size) {
finfo.st_size *= 2; size *= 2;
VBIOS = realloc(VBIOS, finfo.st_size); VBIOS = realloc(VBIOS, size);
} }
} }
} else { } else {
VBIOS = mmap(NULL, finfo.st_size, PROT_READ, MAP_SHARED, fd, 0); VBIOS = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0);
if (VBIOS == MAP_FAILED) { if (VBIOS == MAP_FAILED) {
printf("failed to map \"%s\": %s\n", filename, strerror(errno)); printf("failed to map \"%s\": %s\n", filename, strerror(errno));
return 1; return 1;
@ -887,7 +889,7 @@ int main(int argc, char **argv)
} }
/* Scour memory looking for the VBT signature */ /* Scour memory looking for the VBT signature */
for (i = 0; i + 4 < finfo.st_size; i++) { for (i = 0; i + 4 < size; i++) {
if (!memcmp(VBIOS + i, "$VBT", 4)) { if (!memcmp(VBIOS + i, "$VBT", 4)) {
vbt_off = i; vbt_off = i;
vbt = (struct vbt_header *)(VBIOS + i); vbt = (struct vbt_header *)(VBIOS + i);
@ -903,7 +905,7 @@ int main(int argc, char **argv)
printf("VBT vers: %d.%d\n", vbt->version / 100, vbt->version % 100); printf("VBT vers: %d.%d\n", vbt->version / 100, vbt->version % 100);
bdb_off = vbt_off + vbt->bdb_offset; bdb_off = vbt_off + vbt->bdb_offset;
if (bdb_off >= finfo.st_size - sizeof(struct bdb_header)) { if (bdb_off >= size - sizeof(struct bdb_header)) {
printf("Invalid VBT found, BDB points beyond end of data block\n"); printf("Invalid VBT found, BDB points beyond end of data block\n");
return 1; return 1;
} }
@ -916,7 +918,7 @@ int main(int argc, char **argv)
printf("Available sections: "); printf("Available sections: ");
for (i = 0; i < 256; i++) { for (i = 0; i < 256; i++) {
block = find_section(i, finfo.st_size); block = find_section(i, size);
if (!block) if (!block)
continue; continue;
printf("%d ", i); printf("%d ", i);
@ -929,19 +931,19 @@ int main(int argc, char **argv)
if (devid == -1) if (devid == -1)
printf("Warning: could not find PCI device ID!\n"); printf("Warning: could not find PCI device ID!\n");
dump_general_features(finfo.st_size); dump_general_features(size);
dump_general_definitions(finfo.st_size); dump_general_definitions(size);
dump_child_devices(finfo.st_size); dump_child_devices(size);
dump_lvds_options(finfo.st_size); dump_lvds_options(size);
dump_lvds_data(finfo.st_size); dump_lvds_data(size);
dump_lvds_ptr_data(finfo.st_size); dump_lvds_ptr_data(size);
dump_backlight_info(finfo.st_size); dump_backlight_info(size);
dump_sdvo_lvds_options(finfo.st_size); dump_sdvo_lvds_options(size);
dump_sdvo_panel_dtds(finfo.st_size); dump_sdvo_panel_dtds(size);
dump_driver_feature(finfo.st_size); dump_driver_feature(size);
dump_edp(finfo.st_size); dump_edp(size);
return 0; return 0;
} }