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qcacmn: Fix napi_complete function call limitation

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napi_completion could stop NAPI re-queue only if
returned budget is small than limit budget. WLAN
driver IRQ affinity change would force NAPI complete.
In some cases, RX is in busy loop, RX NAPI could be
queued to more than one CPU NAPI polling list, which
will lead system crash. This change is aimed to make
sure that returned budget is smaller than the limit.

Change-Id: I1b93596b8afc3ee09c4caeceb7a7ba98c4bed4d1
CRs-Fixed: 3420953
This commit is contained in:
Yu Tian
2023-03-01 00:08:08 -08:00
committed by Madan Koyyalamudi
parent e93182a1b2
commit 3cbef591fb
1 changed files with 8 additions and 1 deletions
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9
hif/src/hif_exec.c
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@@ -649,6 +649,7 @@ static int hif_exec_poll(struct napi_struct *napi, int budget)
int actual_dones;
int shift = hif_ext_group->scale_bin_shift;
int cpu = smp_processor_id();
bool force_complete = false;
hif_record_event(hif_ext_group->hif, hif_ext_group->grp_id,
0, 0, 0, HIF_EVENT_BH_SCHED);
@@ -666,7 +667,13 @@ static int hif_exec_poll(struct napi_struct *napi, int budget)
actual_dones = work_done;
if (hif_is_force_napi_complete_required(hif_ext_group) ||
if (hif_is_force_napi_complete_required(hif_ext_group)) {
force_complete = true;
if (work_done >= normalized_budget)
work_done = normalized_budget - 1;
}
if (qdf_unlikely(force_complete) ||
(!hif_ext_group->force_break && work_done < normalized_budget) ||
((pld_is_one_msi(scn->qdf_dev->dev) &&
hif_irq_disabled_time_limit_reached(hif_ext_group)))) {