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authorRafał Miłecki <rafal@milecki.pl>2018-07-15 23:23:42 +0200
committerRafał Miłecki <rafal@milecki.pl>2018-07-15 23:27:09 +0200
commit82498a7f7aa86ad0e93ef60d50dccaa0a9549e4c (patch)
tree16db1aab529e2d4fb3812ee250b1ae4df497505d /package/system/mtd/src
parent49bdd43da236af54b6b82d995b81532e7becf08f (diff)
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mtd: improve check for TRX header being already fixed
First of all lengths should be compared after checking all blocks for being good/bad. It's because requested length may differ from a final one if there were some bad blocks. Secondly it makes sense to also compare crc32 since we already have a new one calculated. Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Diffstat (limited to 'package/system/mtd/src')
-rw-r--r--package/system/mtd/src/trx.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/package/system/mtd/src/trx.c b/package/system/mtd/src/trx.c
index c1296a5f70..aaca232b6f 100644
--- a/package/system/mtd/src/trx.c
+++ b/package/system/mtd/src/trx.c
@@ -207,13 +207,6 @@ mtd_fixtrx(const char *mtd, size_t offset, size_t data_size)
exit(1);
}
- if (trx->len == STORE32_LE(data_size + TRX_CRC32_DATA_OFFSET)) {
- if (quiet < 2)
- fprintf(stderr, "Header already fixed, exiting\n");
- close(fd);
- return 0;
- }
-
buf = malloc(data_size);
if (!buf) {
perror("malloc");
@@ -243,6 +236,14 @@ mtd_fixtrx(const char *mtd, size_t offset, size_t data_size)
}
data_size = to - buf;
+ if (trx->len == STORE32_LE(data_size + TRX_CRC32_DATA_OFFSET) &&
+ trx->crc32 == STORE32_LE(crc32buf(buf, data_size))) {
+ if (quiet < 2)
+ fprintf(stderr, "Header already fixed, exiting\n");
+ close(fd);
+ return 0;
+ }
+
trx->len = STORE32_LE(data_size + offsetof(struct trx_header, flag_version));
trx->crc32 = STORE32_LE(crc32buf(buf, data_size));