On Thursday, May 16, 2019 12:42:20 PM CEST Rafael J. Wysocki wrote: > From: Rafael J. Wysocki <[email protected]> > > Both acpi_pci_need_resume() and acpi_dev_needs_resume() check if the > current ACPI wakeup configuration of the device matches what is > expected as far as system wakeup from sleep states is concerned, as > reflected by the device_may_wakeup() return value for the device. > > However, they only should do that if wakeup.flags.valid is set for > the device's ACPI companion, because otherwise the wakeup.prepare_count > value for it is meaningless. > > Add the missing wakeup.flags.valid checks to these functions. > > Signed-off-by: Rafael J. Wysocki <[email protected]> > --- > drivers/acpi/device_pm.c | 4 ++-- > drivers/pci/pci-acpi.c | 3 ++- > 2 files changed, 4 insertions(+), 3 deletions(-) > > Index: linux-pm/drivers/pci/pci-acpi.c > =================================================================== > --- linux-pm.orig/drivers/pci/pci-acpi.c > +++ linux-pm/drivers/pci/pci-acpi.c > @@ -666,7 +666,8 @@ static bool acpi_pci_need_resume(struct > if (!adev || !acpi_device_power_manageable(adev)) > return false; > > - if (device_may_wakeup(&dev->dev) != !!adev->wakeup.prepare_count) > + if (adev->wakeup.flags.valid && > + device_may_wakeup(&dev->dev) != !!adev->wakeup.prepare_count) > return true; > > if (acpi_target_system_state() == ACPI_STATE_S0) > Index: linux-pm/drivers/acpi/device_pm.c > =================================================================== > --- linux-pm.orig/drivers/acpi/device_pm.c > +++ linux-pm/drivers/acpi/device_pm.c > @@ -952,8 +952,8 @@ static bool acpi_dev_needs_resume(struct > u32 sys_target = acpi_target_system_state(); > int ret, state; > > - if (!pm_runtime_suspended(dev) || !adev || > - device_may_wakeup(dev) != !!adev->wakeup.prepare_count) > + if (!pm_runtime_suspended(dev) || !adev || (adev->wakeup.flags.valid && > + device_may_wakeup(dev) != !!adev->wakeup.prepare_count)) > return true; > > if (sys_target == ACPI_STATE_S0)
Bjorn, I've assumed no concerns or objections from you regarding this one and queued this up. If that assumption is incorrect, please let me know.
