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>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

1 files changed, 12 insertions, 6 deletions

diff --git a/drivers/mtd/tests/oobtest.c b/drivers/mtd/tests/oobtest.c
index 8e8525f0202f..31762120eb56 100644
--- a/drivers/mtd/tests/oobtest.c
+++ b/drivers/mtd/tests/oobtest.c
@@ -125,7 +125,8 @@ 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;
@@ -135,8 +136,9 @@ 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);
                 }
         }
@@ -144,6 +146,9 @@ 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.
@@ -228,9 +233,10 @@ 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);