diff options
Diffstat (limited to 'drivers/cpuidle')
| -rw-r--r-- | drivers/cpuidle/coupled.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/cpuidle/coupled.c b/drivers/cpuidle/coupled.c index 5d396273006..f8a86364c6b 100644 --- a/drivers/cpuidle/coupled.c +++ b/drivers/cpuidle/coupled.c @@ -408,19 +408,22 @@ static void cpuidle_coupled_set_done(int cpu, struct cpuidle_coupled *coupled) * been processed and the poke bit has been cleared. * * Other interrupts may also be processed while interrupts are enabled, so - * need_resched() must be tested after turning interrupts off again to make sure + * need_resched() must be tested after this function returns to make sure * the interrupt didn't schedule work that should take the cpu out of idle. * - * Returns 0 if need_resched was false, -EINTR if need_resched was true. + * Returns 0 if no poke was pending, 1 if a poke was cleared. */ static int cpuidle_coupled_clear_pokes(int cpu) { + if (!cpumask_test_cpu(cpu, &cpuidle_coupled_poke_pending)) + return 0; + local_irq_enable(); while (cpumask_test_cpu(cpu, &cpuidle_coupled_poke_pending)) cpu_relax(); local_irq_disable(); - return need_resched() ? -EINTR : 0; + return 1; } static bool cpuidle_coupled_any_pokes_pending(struct cpuidle_coupled *coupled) @@ -464,7 +467,8 @@ int cpuidle_enter_state_coupled(struct cpuidle_device *dev, return -EINVAL; while (coupled->prevent) { - if (cpuidle_coupled_clear_pokes(dev->cpu)) { + cpuidle_coupled_clear_pokes(dev->cpu); + if (need_resched()) { local_irq_enable(); return entered_state; } @@ -503,7 +507,10 @@ retry: */ while (!cpuidle_coupled_cpus_waiting(coupled) || !cpumask_test_cpu(dev->cpu, &cpuidle_coupled_poked)) { - if (cpuidle_coupled_clear_pokes(dev->cpu)) { + if (cpuidle_coupled_clear_pokes(dev->cpu)) + continue; + + if (need_resched()) { cpuidle_coupled_set_not_waiting(dev->cpu, coupled); goto out; } @@ -518,7 +525,8 @@ retry: local_irq_disable(); } - if (cpuidle_coupled_clear_pokes(dev->cpu)) { + cpuidle_coupled_clear_pokes(dev->cpu); + if (need_resched()) { cpuidle_coupled_set_not_waiting(dev->cpu, coupled); goto out; } |