RDMA/rxe: Fix redundant skb_put_zero

rxe_init_packet() in rxe_net.c calls skb_put_zero() to reserve space for
the payload and zero it out. All these bytes are then re-written with RoCE
headers and payload. Remove this useless extra copy.

Fixes: ecb238f6a7f3 ("IB/cxgb4: use skb_put_zero()/__skb_put_zero")
Link: https://lore.kernel.org/r/20210618045742.204195-7-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/drivers/infiniband/sw/rxe/rxe_net.c b/drivers/infiniband/sw/rxe/rxe_net.c
index c4350ce3b3067ec0c7fb647106983593abcfc4b2..dec92928a1cd8d8e3fbb2b1c2eb35586c5f2e1cc 100644 (file)
--- a/drivers/infiniband/sw/rxe/rxe_net.c
+++ b/drivers/infiniband/sw/rxe/rxe_net.c
@@ -468,7 +468,7 @@ struct sk_buff *rxe_init_packet(struct rxe_dev *rxe, struct rxe_av *av,
 
        pkt->rxe        = rxe;
        pkt->port_num   = port_num;
-       pkt->hdr        = skb_put_zero(skb, paylen);
+       pkt->hdr        = skb_put(skb, paylen);
        pkt->mask       |= RXE_GRH_MASK;
 
 out: