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crypto: qat - Prevent dma mapping zero length assoc data 

Do not attempt to dma map associated data if it is zero length.

Cc: stable@vger.kernel.org
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
Tested-by: Nikolay Aleksandrov <nikolay@redhat.com>
Reviewed-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tadeusz Struk 2014-10-13 18:24:26 -07:00 committed by Herbert Xu
parent f114040e3e
commit 923a6e5e5f
1 changed files with 2 additions and 0 deletions
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2
drivers/crypto/qat/qat_common/qat_algs.c
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@ -605,6 +605,8 @@ static int qat_alg_sgl_to_bufl(struct qat_crypto_instance *inst,
goto err; goto err;
for_each_sg(assoc, sg, assoc_n, i) { for_each_sg(assoc, sg, assoc_n, i) {
if (!sg->length)
continue;
bufl->bufers[bufs].addr = dma_map_single(dev, bufl->bufers[bufs].addr = dma_map_single(dev,
sg_virt(sg), sg_virt(sg),
sg->length, sg->length,