[PATCH 3.2 06/94] crypto: s5p-sss - fix incorrect usage of scatterlists api

[Ben Hutchings]

3.2.82-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Marek Szyprowski <m.szyprow...@samsung.com>

commit d1497977fecb9acce05988d6322ad415ef93bb39 upstream.

sg_dma_len() macro can be used only on scattelists which are mapped, so
all calls to it before dma_map_sg() are invalid. Replace them by proper
check for direct sg segment length read.

Fixes: a49e490c7a8a ("crypto: s5p-sss - add S5PV210 advanced crypto engine 
support")
Fixes: 9e4a1100a445 ("crypto: s5p-sss - Handle unaligned buffers")
Signed-off-by: Marek Szyprowski <m.szyprow...@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlow...@samsung.com>
Acked-by: Vladimir Zapolskiy <v...@mleia.com>
Signed-off-by: Herbert Xu <herb...@gondor.apana.org.au>
[bwh: Backported to 3.2: unaligned DMA is unsupported so there is a different
 set of calls to replace]
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
--- a/drivers/crypto/s5p-sss.c
+++ b/drivers/crypto/s5p-sss.c
@@ -210,11 +210,11 @@ static int s5p_set_outdata(struct s5p_ae
 {
        int err;
 
-       if (!IS_ALIGNED(sg_dma_len(sg), AES_BLOCK_SIZE)) {
+       if (!IS_ALIGNED(sg->length, AES_BLOCK_SIZE)) {
                err = -EINVAL;
                goto exit;
        }
-       if (!sg_dma_len(sg)) {
+       if (!sg->length) {
                err = -EINVAL;
                goto exit;
        }
@@ -236,11 +236,11 @@ static int s5p_set_indata(struct s5p_aes
 {
        int err;
 
-       if (!IS_ALIGNED(sg_dma_len(sg), AES_BLOCK_SIZE)) {
+       if (!IS_ALIGNED(sg->length, AES_BLOCK_SIZE)) {
                err = -EINVAL;
                goto exit;
        }
-       if (!sg_dma_len(sg)) {
+       if (!sg->length) {
                err = -EINVAL;
                goto exit;
        }