[PATCH] RDMA/siw: use crypto_shash_digest() in siw_qp_prepare_tx()

[Eric Biggers <ebiggers@kernel.org>]

From: Eric Biggers <ebiggers@google.com>

Simplify siw_qp_prepare_tx() by using crypto_shash_digest() instead of
an init+update+final sequence.  This should also improve performance.

Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 drivers/infiniband/sw/siw/siw_qp_tx.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/infiniband/sw/siw/siw_qp_tx.c b/drivers/infiniband/sw/siw/siw_qp_tx.c
index 60b6a4135961..5b390f08f1cd 100644
--- a/drivers/infiniband/sw/siw/siw_qp_tx.c
+++ b/drivers/infiniband/sw/siw/siw_qp_tx.c
@@ -242,28 +242,24 @@ static int siw_qp_prepare_tx(struct siw_iwarp_tx *c_tx)
 				c_tx->pkt.c_untagged.ddp_mo = 0;
 			else
 				c_tx->pkt.c_tagged.ddp_to =
 					cpu_to_be64(wqe->sqe.raddr);
 		}
 
 		*(u32 *)crc = 0;
 		/*
 		 * Do complete CRC if enabled and short packet
 		 */
-		if (c_tx->mpa_crc_hd) {
-			crypto_shash_init(c_tx->mpa_crc_hd);
-			if (crypto_shash_update(c_tx->mpa_crc_hd,
-						(u8 *)&c_tx->pkt,
-						c_tx->ctrl_len))
-				return -EINVAL;
-			crypto_shash_final(c_tx->mpa_crc_hd, (u8 *)crc);
-		}
+		if (c_tx->mpa_crc_hd &&
+		    crypto_shash_digest(c_tx->mpa_crc_hd, (u8 *)&c_tx->pkt,
+					c_tx->ctrl_len, (u8 *)crc) != 0)
+			return -EINVAL;
 		c_tx->ctrl_len += MPA_CRC_SIZE;
 
 		return PKT_COMPLETE;
 	}
 	c_tx->ctrl_len += MPA_CRC_SIZE;
 	c_tx->sge_idx = 0;
 	c_tx->sge_off = 0;
 	c_tx->pbl_idx = 0;
 
 	/*

base-commit: 2af9b20dbb39f6ebf9b9b6c090271594627d818e
-- 
2.42.0