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sfc: Don't receive packets when the napi budget == 0 

Processing any incoming packets with a with a napi budget of 0
is incorrect driver behavior.

This matters as netpoll will shortly call drivers with a budget of 0
to avoid receive packet processing happening in hard irq context.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman 2014-03-14 18:11:22 -07:00 committed by David S. Miller
parent c7b82cc8d9
commit 75363a4676
2 changed files with 6 additions and 0 deletions
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3
drivers/net/ethernet/sfc/ef10.c
View File

@ -1955,6 +1955,9 @@ static int efx_ef10_ev_process(struct efx_channel *channel, int quota)
int tx_descs = 0;
int spent = 0;
if (quota <= 0)
return spent;
read_ptr = channel->eventq_read_ptr;
for (;;) {

3
drivers/net/ethernet/sfc/farch.c
View File

@ -1248,6 +1248,9 @@ int efx_farch_ev_process(struct efx_channel *channel, int budget)
int tx_packets = 0;
int spent = 0;
if (budget <= 0)
return spent;
read_ptr = channel->eventq_read_ptr;
for (;;) {