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Commit 8517d3af authored by Herbert Xu's avatar Herbert Xu Committed by Greg Kroah-Hartman
Browse files

crypto: marvell/cesa - Avoid empty transfer descriptor 



[ 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: db509a45 ("crypto: marvell/cesa - add TDMA support")
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 32d3e804

drivers/crypto/marvell/hash.c

+1 −1
Original line number Diff line number Diff line
@@ -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