Commit f89e49e7 authored by Anton Blanchard's avatar Anton Blanchard Committed by David S. Miller
Browse files

ibmveth: Use lighter weight read memory barrier in ibmveth_poll 



We want to order the read in ibmveth_rxq_pending_buffer and the read of
ibmveth_rxq_buffer_valid which are both cacheable memory. smp_rmb() is good
enough for this.

Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarSantiago Leon <santil@linux.vnet.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8d86c61a

drivers/net/ibmveth.c

+1 −1
Original line number Diff line number Diff line
@@ -1010,7 +1010,7 @@ static int ibmveth_poll(struct napi_struct *napi, int budget) 
		if (!ibmveth_rxq_pending_buffer(adapter))

			break;



		rmb();

		smp_rmb();

		if (!ibmveth_rxq_buffer_valid(adapter)) {

			wmb(); /* suggested by larson1 */

			adapter->rx_invalid_buffer++;