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authorRafał Miłecki <rafal@milecki.pl>2022-03-25 13:00:25 +0100
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2022-03-28 08:49:40 +0200
commite62ea740c5e4edb37065193c400a3a82d5479c15 (patch)
tree3f1ddec3f2dfb5b9eb53e1668bfac05063c2de86 /nand-utils
parent0a3d242564646908b63fe7602e9b986edbbb555d (diff)
nandwrite: warn about writing 0xff blocks
Such blocks may be incorrectly treated as empty (even though they may have non-erase OOB). Warn about it so people may start useing --skip-all-ffs . Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'nand-utils')
-rw-r--r--nand-utils/nandwrite.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/nand-utils/nandwrite.c b/nand-utils/nandwrite.c
index e8a210c..cd53a17 100644
--- a/nand-utils/nandwrite.c
+++ b/nand-utils/nandwrite.c
@@ -280,6 +280,7 @@ int main(int argc, char * const argv[])
libmtd_t mtd_desc;
int ebsize_aligned;
uint8_t write_mode;
+ size_t all_ffs_cnt = 0;
process_options(argc, argv);
@@ -417,6 +418,8 @@ int main(int argc, char * const argv[])
*/
while ((imglen > 0 || writebuf < filebuf + filebuf_len)
&& mtdoffset < mtd.size) {
+ bool allffs;
+
/*
* New eraseblock, check for bad block(s)
* Stay in the loop to be sure that, if mtdoffset changes because
@@ -555,7 +558,8 @@ int main(int argc, char * const argv[])
}
ret = 0;
- if (!skipallffs || !buffer_check_pattern(writebuf, mtd.min_io_size, 0xff)) {
+ allffs = buffer_check_pattern(writebuf, mtd.min_io_size, 0xff);
+ if (!allffs || !skipallffs) {
/* Write out data */
ret = mtd_write(mtd_desc, &mtd, fd, mtdoffset / mtd.eb_size,
mtdoffset % mtd.eb_size,
@@ -564,6 +568,8 @@ int main(int argc, char * const argv[])
writeoob ? oobbuf : NULL,
writeoob ? mtd.oob_size : 0,
write_mode);
+ if (!ret && allffs)
+ all_ffs_cnt++;
}
if (ret) {
@@ -615,6 +621,11 @@ closeall:
|| (writebuf < filebuf + filebuf_len))
sys_errmsg_die("Data was only partially written due to error");
+ if (all_ffs_cnt) {
+ fprintf(stderr, "Written %zu blocks containing only 0xff bytes\n", all_ffs_cnt);
+ fprintf(stderr, "Those block may be incorrectly treated as empty!\n");
+ }
+
/* Return happy */
return EXIT_SUCCESS;
}