[PATCH 3.16.y-ckt 28/58] netxen: fix netxen_nic_poll() logic

From: Luis Henriques
Date: Thu Feb 19 2015 - 09:00:51 EST

3.16.7-ckt7 -stable review patch. If anyone has any objections, please let me know.


From: Eric Dumazet <edumazet@xxxxxxxxxx>

commit 6088beef3f7517717bd21d90b379714dd0837079 upstream.

NAPI poll logic now enforces that a poller returns exactly the budget
when it wants to be called again.

If a driver limits TX completion, it has to return budget as well when
the limit is hit, not the number of received packets.

Reported-and-tested-by: Mike Galbraith <umgwanakikbuti@xxxxxxxxx>
Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Fixes: d75b1ade567f ("net: less interrupt masking in NAPI")
Cc: Manish Chopra <manish.chopra@xxxxxxxxxx>
Acked-by: Manish Chopra <manish.chopra@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c b/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c
index 5bf05818a12c..87acca703658 100644
--- a/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c
+++ b/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c
@@ -2391,7 +2391,10 @@ static int netxen_nic_poll(struct napi_struct *napi, int budget)

work_done = netxen_process_rcv_ring(sds_ring, budget);

- if ((work_done < budget) && tx_complete) {
+ if (!tx_complete)
+ work_done = budget;
+ if (work_done < budget) {
if (test_bit(__NX_DEV_UP, &adapter->state))

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/