diff options
| author | Roger Quadros <rogerq@ti.com> | 2014-10-21 17:53:27 +0400 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2014-11-20 10:25:06 +0300 |
| commit | 5a66088bffd9a5251e96ca5d0d46456ab9196287 (patch) | |
| tree | 91bdd8b45c770fe3e3910d54357e09aff83f2cd2 /drivers/mtd | |
| parent | 096916610f415e07cfe71d71a391011c617be5ed (diff) | |
| download | linux-5a66088bffd9a5251e96ca5d0d46456ab9196287.tar.xz | |
mtd: mtd_oobtest: Show the verification error location and data
Add a function memcmpshow() that compares the 2 data buffers
and shows the address:offset and data bytes on comparison failure.
This function does not break at a comparison failure but runs the
check for the whole data buffer.
Use memcmpshow() instead of memcmp() for all the verification paths.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/tests/oobtest.c | 36 |
1 files changed, 29 insertions, 7 deletions
diff --git a/drivers/mtd/tests/oobtest.c b/drivers/mtd/tests/oobtest.c index dc4f9602b97e..edd859d96d85 100644 --- a/drivers/mtd/tests/oobtest.c +++ b/drivers/mtd/tests/oobtest.c @@ -115,6 +115,26 @@ static int write_whole_device(void) return 0; } +/* Display the address, offset and data bytes at comparison failure */ +static int memcmpshow(loff_t addr, const void *cs, const void *ct, size_t count) +{ + const unsigned char *su1, *su2; + int res; + int ret = 0; + size_t i = 0; + + for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--, i++) { + res = *su1 ^ *su2; + if (res) { + pr_info("error @addr[0x%lx:0x%x] 0x%x -> 0x%x diff 0x%x\n", + (unsigned long)addr, i, *su1, *su2, res); + ret = 1; + } + } + + return ret; +} + static int verify_eraseblock(int ebnum) { int i; @@ -139,8 +159,9 @@ static int verify_eraseblock(int ebnum) errcnt += 1; return err ? err : -1; } - if (memcmp(readbuf, writebuf + (use_len_max * i) + use_offset, - use_len)) { + if (memcmpshow(addr, readbuf, + writebuf + (use_len_max * i) + use_offset, + use_len)) { pr_err("error: verify failed at %#llx\n", (long long)addr); errcnt += 1; @@ -167,9 +188,9 @@ static int verify_eraseblock(int ebnum) errcnt += 1; return err ? err : -1; } - if (memcmp(readbuf + use_offset, - writebuf + (use_len_max * i) + use_offset, - use_len)) { + if (memcmpshow(addr, readbuf + use_offset, + writebuf + (use_len_max * i) + use_offset, + use_len)) { pr_err("error: verify failed at %#llx\n", (long long)addr); errcnt += 1; @@ -233,7 +254,7 @@ static int verify_eraseblock_in_one_go(int ebnum) errcnt += 1; return err ? err : -1; } - if (memcmp(readbuf, writebuf, len)) { + if (memcmpshow(addr, readbuf, writebuf, len)) { pr_err("error: verify failed at %#llx\n", (long long)addr); errcnt += 1; @@ -610,7 +631,8 @@ static int __init mtd_oobtest_init(void) err = mtd_read_oob(mtd, addr, &ops); if (err) goto out; - if (memcmp(readbuf, writebuf, mtd->ecclayout->oobavail * 2)) { + if (memcmpshow(addr, readbuf, writebuf, + mtd->ecclayout->oobavail * 2)) { pr_err("error: verify failed at %#llx\n", (long long)addr); errcnt += 1; |