From: "Rafael J. Wysocki" rafael.j.wysocki@intel.com
[ 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@intel.com Reviewed-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/acpi/scan.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index ae74720888dbf..2393cd993b3cb 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -315,18 +315,14 @@ 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); }