From: Richard Cochran <rcochran@linutronix.de>
To: <linux-kernel@vger.kernel.org>
Cc: <rt@linutronix.de>, Len Brown <lenb@kernel.org>,
linux-pm@vger.kernel.org
Subject: [PATCH 08/10] intel_idle: Don't overreact to a cpuidle registration failure.
Date: Tue, 29 Mar 2016 15:16:00 +0200 [thread overview]
Message-ID: <059bd45a474fa9de072f2ef19083694dde9ab183.1459257096.git.rcochran@linutronix.de> (raw)
In-Reply-To: <cover.1459257096.git.rcochran@linutronix.de>
The helper function, intel_idle_cpu_init, registers one new device
with the cpuidle layer. If the registration should fail, that
function immediately calls intel_idle_cpuidle_devices_uninit() to
unregister every last CPU's device. However, it makes no sense to do
so, when called from the hot plug notifier callback.
This patch moves the call to intel_idle_cpuidle_devices_uninit()
outside of the helper function to the one call site that actually
needs to perform the de-registrations.
Cc: Len Brown <lenb@kernel.org>
Cc: linux-pm@vger.kernel.org
Signed-off-by: Richard Cochran <rcochran@linutronix.de>
---
drivers/idle/intel_idle.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index ab34cd8..4418cfa 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -1175,7 +1175,6 @@ static int intel_idle_cpu_init(int cpu)
if (cpuidle_register_device(dev)) {
pr_debug(PREFIX "cpuidle_register_device %d failed!\n", cpu);
- intel_idle_cpuidle_devices_uninit();
return -EIO;
}
@@ -1219,6 +1218,7 @@ static int __init intel_idle_init(void)
for_each_online_cpu(i) {
retval = intel_idle_cpu_init(i);
if (retval) {
+ intel_idle_cpuidle_devices_uninit();
cpu_notifier_register_done();
cpuidle_unregister_driver(&intel_idle_driver);
free_percpu(intel_idle_cpuidle_devices);
--
2.1.4
next prev parent reply other threads:[~2016-03-29 13:17 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-29 13:15 [PATCH 00/10] intel_idle: Fix hot plug handling Richard Cochran
2016-03-29 13:15 ` [PATCH 01/10] intel_idle: remove useless return from void function Richard Cochran
2016-03-29 13:15 ` [PATCH 02/10] intel_idle: Fix a helper function's return value Richard Cochran
2016-03-29 13:15 ` [PATCH 03/10] intel_idle: Remove redundant initialization calls Richard Cochran
2016-03-29 13:15 ` [PATCH 04/10] intel_idle: Fix deallocation order on the driver exit path Richard Cochran
2016-03-29 13:15 ` [PATCH 05/10] intel_idle: Fix dangling registration on error path Richard Cochran
2016-03-29 13:15 ` [PATCH 06/10] intel_idle: Avoid a double free of the per-CPU data Richard Cochran
2016-03-29 13:15 ` [PATCH 07/10] intel_idle: Setup the timer broadcast only on successful driver load Richard Cochran
2016-03-29 13:16 ` Richard Cochran [this message]
2016-03-29 13:16 ` [PATCH 09/10] intel_idle: Propagate hot plug errors Richard Cochran
2016-03-29 13:16 ` [PATCH 10/10] intel_idle: Clean up all registered devices on exit Richard Cochran
2016-04-01 1:39 ` Len Brown
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