diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2014-03-15 05:02:08 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-03-15 06:52:47 +0400 |
| commit | 4c50254902dc57e5f6a52ed601a4b8f976f2ed81 (patch) | |
| tree | fb942e687312e1e228884f432a7721d6cc7d3608 /drivers | |
| parent | 278d5385b148c87d3652886af3c17ea65e1f26da (diff) | |
| download | linux-4c50254902dc57e5f6a52ed601a4b8f976f2ed81.tar.xz | |
enic: 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')
| -rw-r--r-- | drivers/net/ethernet/cisco/enic/enic_main.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c index dcd58f23834a..4c35fc8fad99 100644 --- a/drivers/net/ethernet/cisco/enic/enic_main.c +++ b/drivers/net/ethernet/cisco/enic/enic_main.c @@ -1086,14 +1086,15 @@ static int enic_poll(struct napi_struct *napi, int budget) unsigned int intr = enic_legacy_io_intr(); unsigned int rq_work_to_do = budget; unsigned int wq_work_to_do = -1; /* no limit */ - unsigned int work_done, rq_work_done, wq_work_done; + unsigned int work_done, rq_work_done = 0, wq_work_done; int err; /* Service RQ (first) and WQ */ - rq_work_done = vnic_cq_service(&enic->cq[cq_rq], - rq_work_to_do, enic_rq_service, NULL); + if (budget > 0) + rq_work_done = vnic_cq_service(&enic->cq[cq_rq], + rq_work_to_do, enic_rq_service, NULL); wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do, enic_wq_service, NULL); @@ -1141,14 +1142,15 @@ static int enic_poll_msix(struct napi_struct *napi, int budget) unsigned int cq = enic_cq_rq(enic, rq); unsigned int intr = enic_msix_rq_intr(enic, rq); unsigned int work_to_do = budget; - unsigned int work_done; + unsigned int work_done = 0; int err; /* Service RQ */ - work_done = vnic_cq_service(&enic->cq[cq], - work_to_do, enic_rq_service, NULL); + if (budget > 0) + work_done = vnic_cq_service(&enic->cq[cq], + work_to_do, enic_rq_service, NULL); /* Return intr event credits for this polling * cycle. An intr event is the completion of a |