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authorEric W. Biederman <ebiederm@xmission.com>2014-03-15 05:11:22 +0400
committerDavid S. Miller <davem@davemloft.net>2014-03-15 06:52:48 +0400
commit75363a4676cdb046242d06dca6e8a9c0a20d6c4a (patch)
treef8ae35945d4100401117f32d27d776c16c0cd086 /drivers/net/ethernet/sfc/farch.c
parentc7b82cc8d95e69afe2dc1038fb73abc048a3bca5 (diff)
downloadlinux-75363a4676cdb046242d06dca6e8a9c0a20d6c4a.tar.xz
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>
Diffstat (limited to 'drivers/net/ethernet/sfc/farch.c')
-rw-r--r--drivers/net/ethernet/sfc/farch.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/farch.c b/drivers/net/ethernet/sfc/farch.c
index aa1b169f45ec..a08761360cdf 100644
--- a/drivers/net/ethernet/sfc/farch.c
+++ b/drivers/net/ethernet/sfc/farch.c
@@ -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 (;;) {