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Subject[PATCH v2 2/2] mtd: mtd_oobtest: Fix the address offset with vary_offset case
When vary_offset is set (e.g. test case 3), the offset is not always
zero so memcmpshow() will show the wrong offset in the print message.
To fix this we introduce a new function memcmpshowoffset() which takes
offset as a parameter and displays the right offset and use it in
the case where offset is non zero.

The old memcmpshow() functionality is preserved by converting it into
a macro with offset preset to 0.

Signed-off-by: Roger Quadros <rogerq@ti.com>
---
drivers/mtd/tests/oobtest.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/mtd/tests/oobtest.c b/drivers/mtd/tests/oobtest.c
index be6e181..0d5e85d 100644
--- a/drivers/mtd/tests/oobtest.c
+++ b/drivers/mtd/tests/oobtest.c
@@ -122,7 +122,8 @@ static int write_whole_device(void)
* Display the address, offset and data bytes at comparison failure.
* Return number of bitflips encountered.
*/
-static size_t memcmpshow(loff_t addr, const void *cs, const void *ct, size_t count)
+static size_t memcmpshowoffset(loff_t addr, loff_t offset, const void *cs,
+ const void *ct, size_t count)
{
const unsigned char *su1, *su2;
int res;
@@ -132,8 +133,9 @@ static size_t memcmpshow(loff_t addr, const void *cs, const void *ct, size_t cou
for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--, i++) {
res = *su1 ^ *su2;
if (res) {
- pr_info("error @addr[0x%lx:0x%zx] 0x%x -> 0x%x diff 0x%x\n",
- (unsigned long)addr, i, *su1, *su2, res);
+ pr_info("error @addr[0x%lx:0x%lx] 0x%x -> 0x%x diff 0x%x\n",
+ (unsigned long)addr, (unsigned long)offset + i,
+ *su1, *su2, res);
bitflips += hweight8(res);
}
}
@@ -141,6 +143,9 @@ static size_t memcmpshow(loff_t addr, const void *cs, const void *ct, size_t cou
return bitflips;
}

+#define memcmpshow(addr, cs, ct, count) memcmpshowoffset((addr), 0, (cs), (ct),\
+ (count))
+
/*
* Compare with 0xff and show the address, offset and data bytes at
* comparison failure. Return number of bitflips encountered.
@@ -224,9 +229,10 @@ static int verify_eraseblock(int ebnum)
errcnt += 1;
return err ? err : -1;
}
- bitflips = memcmpshow(addr, readbuf + use_offset,
- writebuf + (use_len_max * i) + use_offset,
- use_len);
+ bitflips = memcmpshowoffset(addr, use_offset,
+ 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);
--
2.1.0



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