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mt76: add utility functions for deferring work to a kernel thread

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In order to avoid keeping work like tx scheduling pinned to the CPU it was
scheduled from, it makes sense to switch from tasklets to kernel threads.

Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Felix Fietkau
2020-08-22 15:56:57 +02:00
parent 5cf34cda70
commit 87a6942906
2 changed files with 103 additions and 0 deletions
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util.c
+28
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@@ -110,4 +110,32 @@ int mt76_get_min_avg_rssi(struct mt76_dev *dev, bool ext_phy)
}
EXPORT_SYMBOL_GPL(mt76_get_min_avg_rssi);
int __mt76_worker_fn(void *ptr)
{
struct mt76_worker *w = ptr;
while (!kthread_should_stop()) {
set_current_state(TASK_INTERRUPTIBLE);
if (kthread_should_park()) {
kthread_parkme();
continue;
}
if (!test_and_clear_bit(MT76_WORKER_SCHEDULED, &w->state)) {
schedule();
continue;
}
set_bit(MT76_WORKER_RUNNING, &w->state);
set_current_state(TASK_RUNNING);
w->fn(w);
cond_resched();
clear_bit(MT76_WORKER_RUNNING, &w->state);
}
return 0;
}
EXPORT_SYMBOL_GPL(__mt76_worker_fn);
MODULE_LICENSE("Dual BSD/GPL");