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enic: unmask intr only when napi is complete

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In case of busy poll, napi_complete_done returns false and does not
dequeue napi. In this case do not unmask the intr. We are guaranteed
napi is called again. This reduces unnecessary iowrites.

Signed-off-by: Govindarajulu Varadarajan <gvaradar@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Govindarajulu Varadarajan 2017-05-22 12:19:48 -07:00 committed by David S. Miller
parent f93e1cdcf4
commit 9acfd1c029
1 changed files with 2 additions and 4 deletions
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6
drivers/net/ethernet/cisco/enic/enic_main.c
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@ -1537,13 +1537,12 @@ static int enic_poll(struct napi_struct *napi, int budget)
*/ */
enic_calc_int_moderation(enic, &enic->rq[0]); enic_calc_int_moderation(enic, &enic->rq[0]);
if (rq_work_done < rq_work_to_do) { if ((rq_work_done < budget) && napi_complete_done(napi, rq_work_done)) {
/* Some work done, but not enough to stay in polling, /* Some work done, but not enough to stay in polling,
* exit polling * exit polling
*/ */
napi_complete_done(napi, rq_work_done);
if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
enic_set_int_moderation(enic, &enic->rq[0]); enic_set_int_moderation(enic, &enic->rq[0]);
vnic_intr_unmask(&enic->intr[intr]); vnic_intr_unmask(&enic->intr[intr]);
@ -1663,13 +1662,12 @@ static int enic_poll_msix_rq(struct napi_struct *napi, int budget)
*/ */
enic_calc_int_moderation(enic, &enic->rq[rq]); enic_calc_int_moderation(enic, &enic->rq[rq]);
if (work_done < work_to_do) { if ((work_done < budget) && napi_complete_done(napi, work_done)) {
/* Some work done, but not enough to stay in polling, /* Some work done, but not enough to stay in polling,
* exit polling * exit polling
*/ */
napi_complete_done(napi, work_done);
if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce) if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
enic_set_int_moderation(enic, &enic->rq[rq]); enic_set_int_moderation(enic, &enic->rq[rq]);
vnic_intr_unmask(&enic->intr[intr]); vnic_intr_unmask(&enic->intr[intr]);