5.10-stable review patch. If anyone has any objections, please let me know.
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From: Rafael J. Wysocki rafael.j.wysocki@intel.com
[ Upstream commit be82483d1b60baf6747884bd74cb7de484deaf76 ]
If system suspend is aborted in the "noirq" phase (for instance, due to an error returned by one of the device callbacks), power.is_noirq_suspended will not be set for some devices and device_resume_noirq() will return early for them. Consequently, noirq resume callbacks will not run for them at all because the noirq suspend callbacks have not run for them yet.
If any of them has power.must_resume set and late suspend has been skipped for it (due to power.smart_suspend), early resume should be skipped for it either, or its state may become inconsistent (for instance, if the early resume assumes that it will always follow noirq resume).
Make that happen by clearing power.must_resume in device_resume_noirq() for devices with power.is_noirq_suspended clear that have been left in suspend by device_suspend_late(), which will subsequently cause device_resume_early() to leave the device in suspend and avoid changing its state.
Fixes: 0d4b54c6fee8 ("PM / core: Add LEAVE_SUSPENDED driver flag") Link: https://lore.kernel.org/linux-pm/5d692b81-6f58-4e86-9cb0-ede69a09d799@rowlan... Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Reviewed-by: Ulf Hansson ulf.hansson@linaro.org Link: https://patch.msgid.link/3381776.aeNJFYEL58@rafael.j.wysocki Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/base/power/main.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 5600ceb9212d9..964573e30d691 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -604,8 +604,20 @@ static void __device_resume_noirq(struct device *dev, pm_message_t state, bool a if (dev->power.syscore || dev->power.direct_complete) goto Out;
- if (!dev->power.is_noirq_suspended) + if (!dev->power.is_noirq_suspended) { + /* + * This means that system suspend has been aborted in the noirq + * phase before invoking the noirq suspend callback for the + * device, so if device_suspend_late() has left it in suspend, + * device_resume_early() should leave it in suspend either in + * case the early resume of it depends on the noirq resume that + * has not run. + */ + if (dev_pm_skip_suspend(dev)) + dev->power.must_resume = false; + goto Out; + }
if (!dpm_wait_for_superior(dev, async)) goto Out;