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bna: fix performance regression 

The recent commit "e29aa33 bna: Enable Multi Buffer RX" is causing
a performance regression. It does not properly update 'cmpl' pointer
at the end of the loop in NAPI handler bnad_cq_process(). The result is
only one packet / per NAPI-schedule is processed.

Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ivan Vecera 2014-07-29 16:29:30 +02:00 committed by David S. Miller
parent 1f74e613de
commit c36c9d50cc
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/brocade/bna/bnad.c
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@ -600,9 +600,9 @@ bnad_cq_process(struct bnad *bnad, struct bna_ccb *ccb, int budget)
prefetch(bnad->netdev); prefetch(bnad->netdev);
cq = ccb->sw_q; cq = ccb->sw_q;
cmpl = &cq[ccb->producer_index];
while (packets < budget) { while (packets < budget) {
cmpl = &cq[ccb->producer_index];
if (!cmpl->valid) if (!cmpl->valid)
break; break;
/* The 'valid' field is set by the adapter, only after writing /* The 'valid' field is set by the adapter, only after writing