3.17-stable review patch. If anyone has any objections, please let me know.
------------------
From: Tadeusz Struk <tadeusz.struk@xxxxxxxxx>
commit 923a6e5e5f171317ac8bb462ac4b814fa7880d3c upstream.
Do not attempt to dma map associated data if it is zero length.
Signed-off-by: Tadeusz Struk <tadeusz.struk@xxxxxxxxx>
Tested-by: Nikolay Aleksandrov <nikolay@xxxxxxxxxx>
Reviewed-by: Prarit Bhargava <prarit@xxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/crypto/qat/qat_common/qat_algs.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/crypto/qat/qat_common/qat_algs.c
+++ b/drivers/crypto/qat/qat_common/qat_algs.c
@@ -650,6 +650,8 @@ static int qat_alg_sgl_to_bufl(struct qa
goto err;
for_each_sg(assoc, sg, assoc_n, i) {
+ if (!sg->length)
+ continue;
bufl->bufers[bufs].addr = dma_map_single(dev,
sg_virt(sg),
sg->length,
--
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