ACPI: scan: Fix device check notification handling

[ Upstream commit 793551c965 ]

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: 443fc82022 ("ACPI / hotplug: Rework generic code to handle suprise removals")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Rafael J. Wysocki 2024-02-26 17:35:27 +01:00 committed by Sasha Levin
parent 44c14eb647
commit 428a21b7be
1 changed files with 2 additions and 6 deletions

View File

@ -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_enumerated(adev);
}