This is a note to let you know that I've just added the patch titled
ACPI: scan: Fix device check notification handling
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
acpi-scan-fix-device-check-notification-handling.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e1fa1cd2e72b1da818988fb4ddad764e3acea282
Author: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Date: Mon Feb 26 17:35:27 2024 +0100
ACPI: scan: Fix device check notification handling
[ Upstream commit 793551c965116d9dfaf0550dacae1396a20efa69 ]
It is generally invalid to fail a Device Check notification if the scan
handler has not been attached to the given device after a bus rescan,
because there may be valid reasons for the scan handler to refuse
attaching to the device (for example, the device is not ready).
For this reason, modify acpi_scan_device_check() to return 0 in that
case without printing a warning.
While at it, reduce the log level of the "already enumerated" message
in the same function, because it is only interesting when debugging
notification handling
Fixes: 443fc8202272 ("ACPI / hotplug: Rework generic code to handle suprise removals")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 1d249d0f61ae4..597d75baa1cc3 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -314,18 +314,14 @@ static int acpi_scan_device_check(struct acpi_device *adev)
* again).
*/
if (adev->handler) {
- dev_warn(&adev->dev, "Already enumerated\n");
- return -EALREADY;
+ dev_dbg(&adev->dev, "Already enumerated\n");
+ return 0;
}
error = acpi_bus_scan(adev->handle);
if (error) {
dev_warn(&adev->dev, "Namespace scan failure\n");
return error;
}
- if (!adev->handler) {
- dev_warn(&adev->dev, "Enumeration failure\n");
- error = -ENODEV;
- }
} else {
error = acpi_scan_device_not_present(adev);
}
