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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-05-20 23:09:49 +0200
committerSasha Levin <sasha.levin@oracle.com>2016-06-06 19:11:10 -0400
commit732468f790115d012dc18a505084aa53e38f4a40 (patch)
treed022db2ac7fed3fc36d3443a0dbb02ea93135eb7
parent3cfc8e5f909390dc75e9910a2447c0dd3247db03 (diff)
PM / sleep: Handle failures in device_suspend_late() consistently
[ Upstream commit 3a17fb329da68cb00558721aff876a80bba2fdb9 ] Grygorii Strashko reports: The PM runtime will be left disabled for the device if its .suspend_late() callback fails and async suspend is not allowed for this device. In this case device will not be added in dpm_late_early_list and dpm_resume_early() will ignore this device, as result PM runtime will be disabled for it forever (side effect: after 8 subsequent failures for the same device the PM runtime will be reenabled due to disable_depth overflow). To fix this problem, add devices to dpm_late_early_list regardless of whether or not device_suspend_late() returns errors for them. That will ensure failures in there to be handled consistently for all devices regardless of their async suspend/resume status. Reported-by: Grygorii Strashko <grygorii.strashko@ti.com> Tested-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: All applicable <stable@vger.kernel.org> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
-rw-r--r--drivers/base/power/main.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 9717d5f20139..508a8f67c028 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -1251,14 +1251,15 @@ int dpm_suspend_late(pm_message_t state)
error = device_suspend_late(dev);
mutex_lock(&dpm_list_mtx);
+ if (!list_empty(&dev->power.entry))
+ list_move(&dev->power.entry, &dpm_late_early_list);
+
if (error) {
pm_dev_err(dev, state, " late", error);
dpm_save_failed_dev(dev_name(dev));
put_device(dev);
break;
}
- if (!list_empty(&dev->power.entry))
- list_move(&dev->power.entry, &dpm_late_early_list);
put_device(dev);
if (async_error)