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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-06-24 01:56:13 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-06-28 01:52:38 +0200
commit8370c2dc4c7b91be7e1231130f0ae08b5aebecf4 (patch)
treeee4c1a4d35ef7ed39107e61a8846f1db2405425f /drivers/acpi/device_pm.c
parent4d183d04195318c8ee8bce048f3f9a89c0e2056d (diff)
downloadlinux-8370c2dc4c7b91be7e1231130f0ae08b5aebecf4.tar.gz
linux-8370c2dc4c7b91be7e1231130f0ae08b5aebecf4.tar.xz
PCI / PM: Drop pme_interrupt flag from struct pci_dev
The pme_interrupt flag in struct pci_dev is set when PMEs generated by the device are going to be signaled via root port PME interrupts. Ironically enough, that information is only used by the code setting up device wakeup through ACPI which returns as soon as it sees the pme_interrupt flag set while setting up "remote runtime wakeup". That is questionable, however, because in theory there may be PCIe devices using out-of-band PME signaling under root ports handled by the native PME code or devices requiring wakeup power setup to be carried out by AML. For such devices, ACPI wakeup should be invoked regardless of whether or not native PME signaling is used in general. For this reason, drop the pme_interrupt flag and rework the code using it which then allows the ACPI-based device wakeup handling in PCI to be consolidated to use one code path for both "runtime remote wakeup" and system wakeup (from sleep states). Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/acpi/device_pm.c')
-rw-r--r--drivers/acpi/device_pm.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index d2e985a4bac2..28938b5a334e 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -496,6 +496,13 @@ bool acpi_bus_can_wakeup(acpi_handle handle)
}
EXPORT_SYMBOL(acpi_bus_can_wakeup);
+bool acpi_pm_device_can_wakeup(struct device *dev)
+{
+ struct acpi_device *adev = ACPI_COMPANION(dev);
+
+ return adev ? acpi_device_can_wakeup(adev) : false;
+}
+
/**
* acpi_dev_pm_get_state - Get preferred power state of ACPI device.
* @dev: Device whose preferred target power state to return.
@@ -737,8 +744,7 @@ int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
error = acpi_device_wakeup(adev, acpi_target_system_state(), enable);
if (!error)
- dev_dbg(dev, "Wakeup %s by ACPI\n",
- enable ? "enabled" : "disabled");
+ dev_dbg(dev, "Wakeup %s by ACPI\n", enable ? "enabled" : "disabled");
return error;
}