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authorRoger Quadros <rogerq@ti.com>2014-12-05 17:18:39 +0200
committerBrian Norris <computersforpeace@gmail.com>2015-04-05 18:10:23 -0700
commitd2b51c808745ca93c020ba34a3cf256ad52adc63 (patch)
tree6dde6542d2de918e83a23df020c2b37e9b06074b /drivers/mtd/tests
parent45fd357a491ecc56c0f9bb110bd05d9caf28889f (diff)
downloadop-kernel-dev-d2b51c808745ca93c020ba34a3cf256ad52adc63.zip
op-kernel-dev-d2b51c808745ca93c020ba34a3cf256ad52adc63.tar.gz
mtd: mtd_oobtest: Fix bitflip_limit usage in test case 3
In test case 3, we set vary_offset to write at different offsets and lengths in the OOB available area. We need to do the bitflip_limit check while checking for 0xff outside the OOB offset + length area that we didn't modify during write. Signed-off-by: Roger Quadros <rogerq@ti.com> [Brian: whitespace fixup] Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd/tests')
-rw-r--r--drivers/mtd/tests/oobtest.c62
1 files changed, 35 insertions, 27 deletions
diff --git a/drivers/mtd/tests/oobtest.c b/drivers/mtd/tests/oobtest.c
index 64390ab..c6b3564 100644
--- a/drivers/mtd/tests/oobtest.c
+++ b/drivers/mtd/tests/oobtest.c
@@ -141,6 +141,31 @@ static size_t memcmpshow(loff_t addr, const void *cs, const void *ct, size_t cou
return bitflips;
}
+/*
+ * Compare with 0xff and show the address, offset and data bytes at
+ * comparison failure. Return number of bitflips encountered.
+ */
+static size_t memffshow(loff_t addr, loff_t offset, const void *cs,
+ size_t count)
+{
+ const unsigned char *su1;
+ int res;
+ size_t i = 0;
+ size_t bitflips = 0;
+
+ for (su1 = cs; 0 < count; ++su1, count--, i++) {
+ res = *su1 ^ 0xff;
+ if (res) {
+ pr_info("error @addr[0x%lx:0x%lx] 0x%x -> 0xff diff 0x%x\n",
+ (unsigned long)addr, (unsigned long)offset + i,
+ *su1, res);
+ bitflips += hweight8(res);
+ }
+ }
+
+ return bitflips;
+}
+
static int verify_eraseblock(int ebnum)
{
int i;
@@ -203,6 +228,15 @@ static int verify_eraseblock(int ebnum)
bitflips = memcmpshow(addr, readbuf + use_offset,
writebuf + (use_len_max * i) + use_offset,
use_len);
+
+ /* verify pre-offset area for 0xff */
+ bitflips += memffshow(addr, 0, readbuf, use_offset);
+
+ /* verify post-(use_offset + use_len) area for 0xff */
+ k = use_offset + use_len;
+ bitflips += memffshow(addr, k, readbuf + k,
+ mtd->ecclayout->oobavail - k);
+
if (bitflips > bitflip_limit) {
pr_err("error: verify failed at %#llx\n",
(long long)addr);
@@ -212,34 +246,8 @@ static int verify_eraseblock(int ebnum)
return -1;
}
} else if (bitflips) {
- pr_info("ignoring error as within bitflip_limit\n");
+ pr_info("ignoring errors as within bitflip limit\n");
}
-
- for (k = 0; k < use_offset; ++k)
- if (readbuf[k] != 0xff) {
- pr_err("error: verify 0xff "
- "failed at %#llx\n",
- (long long)addr);
- errcnt += 1;
- if (errcnt > 1000) {
- pr_err("error: too "
- "many errors\n");
- return -1;
- }
- }
- for (k = use_offset + use_len;
- k < mtd->ecclayout->oobavail; ++k)
- if (readbuf[k] != 0xff) {
- pr_err("error: verify 0xff "
- "failed at %#llx\n",
- (long long)addr);
- errcnt += 1;
- if (errcnt > 1000) {
- pr_err("error: too "
- "many errors\n");
- return -1;
- }
- }
}
if (vary_offset)
do_vary_offset();
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