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authorTero Kristo <t-kristo@ti.com>2018-02-27 15:30:34 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2018-03-09 22:45:36 +0800
commit4c219855a595d0af599b1f9558ccfc8a0d812e2b (patch)
tree3848e9cdbdfb44d255e70f3fd55ed8fc4c853a71 /drivers/crypto/omap-sham.c
parent6a4967c3e1fc1f2fd19283e5c98076a65f7b29ff (diff)
downloadlinux-4c219855a595d0af599b1f9558ccfc8a0d812e2b.tar.bz2
crypto: omap-sham - Verify page zone of scatterlists before starting DMA
In certain platforms like DRA7xx having memory > 2GB with LPAE enabled has a constraint that DMA can be done with the initial 2GB and marks it as ZONE_DMA. But openssl when used with cryptodev does not make sure that input buffer is DMA capable. So, adding a check to verify if the input buffer is capable of DMA. Signed-off-by: Tero Kristo <t-kristo@ti.com> Reported-by: Aparna Balasubramanian <aparnab@ti.com> Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/omap-sham.c')
-rw-r--r--drivers/crypto/omap-sham.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index 86b89ace836f..ce398b7a2b1c 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -759,6 +759,13 @@ static int omap_sham_align_sgs(struct scatterlist *sg,
while (nbytes > 0 && sg_tmp) {
n++;
+#ifdef CONFIG_ZONE_DMA
+ if (page_zonenum(sg_page(sg_tmp)) != ZONE_DMA) {
+ aligned = false;
+ break;
+ }
+#endif
+
if (offset < sg_tmp->length) {
if (!IS_ALIGNED(offset + sg_tmp->offset, 4)) {
aligned = false;