[PATCH v3 20/40] cmd: Fix memory-mapping in cmp command

[Simon Glass]

This unmaps a different address from what was mapped. Fix it.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

(no changes since v1)

 cmd/mem.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/cmd/mem.c b/cmd/mem.c
index 274348068c2..4d6fde28531 100644
--- a/cmd/mem.c
+++ b/cmd/mem.c
@@ -245,7 +245,7 @@ static int do_mem_cmp(struct cmd_tbl *cmdtp, int flag, int argc,
 	int	size;
 	int     rcode = 0;
 	const char *type;
-	const void *buf1, *buf2, *base;
+	const void *buf1, *buf2, *base, *ptr1, *ptr2;
 	ulong word1, word2;  /* 64-bit if MEM_SUPPORT_64BIT_DATA */
 
 	if (argc != 4)
@@ -270,22 +270,22 @@ static int do_mem_cmp(struct cmd_tbl *cmdtp, int flag, int argc,
 	bytes = size * count;
 	base = buf1 = map_sysmem(addr1, bytes);
 	buf2 = map_sysmem(addr2, bytes);
-	for (ngood = 0; ngood < count; ++ngood) {
+	for (ngood = 0, ptr1 = buf1, ptr2 = buf2; ngood < count; ++ngood) {
 		if (size == 4) {
-			word1 = *(u32 *)buf1;
-			word2 = *(u32 *)buf2;
+			word1 = *(u32 *)ptr1;
+			word2 = *(u32 *)ptr2;
 		} else if (MEM_SUPPORT_64BIT_DATA && size == 8) {
-			word1 = *(ulong *)buf1;
-			word2 = *(ulong *)buf2;
+			word1 = *(ulong *)ptr1;
+			word2 = *(ulong *)ptr2;
 		} else if (size == 2) {
-			word1 = *(u16 *)buf1;
-			word2 = *(u16 *)buf2;
+			word1 = *(u16 *)ptr1;
+			word2 = *(u16 *)ptr2;
 		} else {
-			word1 = *(u8 *)buf1;
-			word2 = *(u8 *)buf2;
+			word1 = *(u8 *)ptr1;
+			word2 = *(u8 *)ptr2;
 		}
 		if (word1 != word2) {
-			ulong offset = buf1 - base;
+			ulong offset = ptr1 - base;
 			printf("%s at 0x%08lx (%#0*lx) != %s at 0x%08lx (%#0*lx)\n",
 				type, (ulong)(addr1 + offset), size, word1,
 				type, (ulong)(addr2 + offset), size, word2);
@@ -293,8 +293,8 @@ static int do_mem_cmp(struct cmd_tbl *cmdtp, int flag, int argc,
 			break;
 		}
 
-		buf1 += size;
-		buf2 += size;
+		ptr1 += size;
+		ptr2 += size;
 
 		/* reset watchdog from time to time */
 		if ((ngood % (64 << 10)) == 0)
-- 
2.34.1