[PATCH v2] crypto: omap-sham: Add the offset of sg page to vaddr

From: Lokesh Vutla
Date: Thu Apr 02 2015 - 06:03:02 EST

kmap_atomic() gives only the page address of the input page.
Driver should take care of adding the offset of the scatterlist
within the page to the returned page address.
omap-sham driver is not adding the offset to page and directly operates
on the return vale of kmap_atomic(), because of which the following
error comes when running crypto tests:

00000000: d9 a1 1b 7c aa 90 3b aa 11 ab cb 25 00 b8 ac bf
[ 2.338169] 00000010: c1 39 cd ff 48 d0 a8 e2 2b fa 33 a1
[ 2.344008] alg: hash: Chunking test 1 failed for omap-sha256

So adding the scatterlist offset to vaddr.

Signed-off-by: Lokesh Vutla <lokeshvutla@xxxxxx>
- Tested on BBB. Logs below.
Without this patch: http://pastebin.ubuntu.com/10722994/
With this patch: http://pastebin.ubuntu.com/10722992/
drivers/crypto/omap-sham.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index 21fd515..4d63e0d 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -640,6 +640,7 @@ static size_t omap_sham_append_sg(struct omap_sham_reqctx *ctx)

while (ctx->sg) {
vaddr = kmap_atomic(sg_page(ctx->sg));
+ vaddr += ctx->sg->offset;

count = omap_sham_append_buffer(ctx,
vaddr + ctx->offset,

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