bna: fix interrupts storm caused by erroneous packets

[ Upstream commit ade4dc3e616e33c80d7e62855fe1b6f9895bc7c3 ]

The commit "e29aa33 bna: Enable Multi Buffer RX" moved packets counter
increment from the beginning of the NAPI processing loop after the check
for erroneous packets so they are never accounted. This counter is used
to inform firmware about number of processed completions (packets).
As these packets are never acked the firmware fires IRQs for them again
and again.

Fixes: e29aa33 ("bna: Enable Multi Buffer RX")
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Acked-by: Rasesh Mody <rasesh.mody@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/brocade/bna/bnad.c b/drivers/net/ethernet/brocade/bna/bnad.c
index 669eeb4eb24764b26d26bd3b36d89ebed3ac39dc..f051783f5882f0c70dba2d3503c56893ef389a82 100644 (file)
--- a/drivers/net/ethernet/brocade/bna/bnad.c
+++ b/drivers/net/ethernet/brocade/bna/bnad.c
@@ -674,6 +674,7 @@ bnad_cq_process(struct bnad *bnad, struct bna_ccb *ccb, int budget)
                        if (!next_cmpl->valid)
                                break;
                }
+               packets++;
 
                /* TODO: BNA_CQ_EF_LOCAL ? */
                if (unlikely(flags & (BNA_CQ_EF_MAC_ERROR |
@@ -690,7 +691,6 @@ bnad_cq_process(struct bnad *bnad, struct bna_ccb *ccb, int budget)
                else
                        bnad_cq_setup_skb_frags(rcb, skb, sop_ci, nvecs, len);
 
-               packets++;
                rcb->rxq->rx_packets++;
                rcb->rxq->rx_bytes += totlen;
                ccb->bytes_per_intr += totlen;