diff options
| -rw-r--r-- | drivers/pci/pci-driver.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 46767c53917a..12d1e81a8abe 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -18,6 +18,7 @@ #include <linux/sched.h> #include <linux/cpu.h> #include <linux/pm_runtime.h> +#include <linux/suspend.h> #include "pci.h" struct pci_dynid { @@ -616,6 +617,21 @@ static int pci_pm_prepare(struct device *dev) int error = 0; /* + * If a PCI device configured to wake up the system from sleep states + * has been suspended at run time and there's a resume request pending + * for it, this is equivalent to the device signaling wakeup, so the + * system suspend operation should be aborted. + */ + pm_runtime_get_noresume(dev); + if (pm_runtime_barrier(dev) && device_may_wakeup(dev)) + pm_wakeup_event(dev, 0); + + if (pm_wakeup_pending()) { + pm_runtime_put_sync(dev); + return -EBUSY; + } + + /* * PCI devices suspended at run time need to be resumed at this * point, because in general it is necessary to reconfigure them for * system suspend. Namely, if the device is supposed to wake up the @@ -624,7 +640,7 @@ static int pci_pm_prepare(struct device *dev) * system from the sleep state, we'll have to prevent it from signaling * wake-up. */ - pm_runtime_get_sync(dev); + pm_runtime_resume(dev); if (drv && drv->pm && drv->pm->prepare) error = drv->pm->prepare(dev); |