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crypto: omap-sham - Verify page zone of scatterlists before starting DMA

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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>
This commit is contained in:
Tero Kristo 2018-02-27 15:30:34 +02:00 committed by Herbert Xu
parent 6a4967c3e1
commit 4c219855a5
1 changed files with 7 additions and 0 deletions
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7
drivers/crypto/omap-sham.c
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@ -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;