diff options
| author |   Eric W. Biederman <ebiederm@xmission.com> | 2014-03-14 18:11:22 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-03-14 22:52:48 -0400 |
| commit | 75363a4676cdb046242d06dca6e8a9c0a20d6c4a (patch) | |
| tree | f8ae35945d4100401117f32d27d776c16c0cd086 /drivers/net/ethernet/sfc | |
| parent | vxge: Don't receive packets when the napi budget == 0 (diff) | |
| download | linux-dev-75363a4676cdb046242d06dca6e8a9c0a20d6c4a.tar.xz linux-dev-75363a4676cdb046242d06dca6e8a9c0a20d6c4a.zip | |
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')
| -rw-r--r-- | drivers/net/ethernet/sfc/ef10.c | 3 | ||||
| -rw-r--r-- | drivers/net/ethernet/sfc/farch.c | 3 |
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c index eb75675f6e32..651626e133f9 100644 --- a/drivers/net/ethernet/sfc/ef10.c +++ b/drivers/net/ethernet/sfc/ef10.c @@ -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 (;;) { 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 (;;) { |