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-rw-r--r--package/system/mtd/src/trx.c23
1 files changed, 18 insertions, 5 deletions
diff --git a/package/system/mtd/src/trx.c b/package/system/mtd/src/trx.c
index 00c4d6c0b5..f310f51087 100644
--- a/package/system/mtd/src/trx.c
+++ b/package/system/mtd/src/trx.c
@@ -152,6 +152,7 @@ mtd_fixtrx(const char *mtd, size_t offset)
{
int fd;
struct trx_header *trx;
+ char *first_block;
char *buf;
ssize_t res;
size_t block_offset;
@@ -173,19 +174,19 @@ mtd_fixtrx(const char *mtd, size_t offset)
exit(1);
}
- buf = malloc(erasesize);
- if (!buf) {
+ first_block = malloc(erasesize);
+ if (!first_block) {
perror("malloc");
exit(1);
}
- res = pread(fd, buf, erasesize, block_offset);
+ res = pread(fd, first_block, erasesize, block_offset);
if (res != erasesize) {
perror("pread");
exit(1);
}
- trx = (struct trx_header *) (buf + offset);
+ trx = (struct trx_header *)(first_block + offset);
if (trx->magic != STORE32_LE(0x30524448)) {
fprintf(stderr, "No trx magic found\n");
exit(1);
@@ -198,6 +199,18 @@ mtd_fixtrx(const char *mtd, size_t offset)
return 0;
}
+ buf = malloc(erasesize);
+ if (!buf) {
+ perror("malloc");
+ exit(1);
+ }
+
+ res = pread(fd, buf, erasesize, block_offset);
+ if (res != erasesize) {
+ perror("pread");
+ exit(1);
+ }
+
trx->len = STORE32_LE(erasesize - offset);
trx->crc32 = STORE32_LE(crc32buf((char*) &trx->flag_version, erasesize - offset - 3*4));
@@ -209,7 +222,7 @@ mtd_fixtrx(const char *mtd, size_t offset)
if (quiet < 2)
fprintf(stderr, "New crc32: 0x%x, rewriting block\n", trx->crc32);
- if (pwrite(fd, buf, erasesize, block_offset) != erasesize) {
+ if (pwrite(fd, first_block, erasesize, block_offset) != erasesize) {
fprintf(stderr, "Error writing block (%s)\n", strerror(errno));
exit(1);
}