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crypto: marvell/cesa - Avoid empty transfer descriptor

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[ Upstream commit 1bafd82d9a40cf09c6c40f1c09cc35b7050b1a9f ]

The user may set req->src even if req->nbytes == 0.  If there
is no data to hash from req->src, do not generate an empty TDMA
descriptor.

Fixes: db509a4533 ("crypto: marvell/cesa - add TDMA support")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Herbert Xu 2025-05-10 18:43:33 +08:00 • committed by Greg Kroah-Hartman
commit 8517d3af60
1 changed files with 1 additions and 1 deletions
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2
drivers/crypto/marvell/hash.c
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@ -630,7 +630,7 @@ static int mv_cesa_ahash_dma_req_init(struct ahash_request *req)
if (ret)
goto err_free_tdma;
if (iter.src.sg) {
if (iter.base.len > iter.src.op_offset) {
/*
* Add all the new data, inserting an operation block and
* launch command between each full SRAM block-worth of