s390/dasd: fix hanging offline processing due to canceled worker

[ Upstream commit 669f3765b755fd8739ab46ce3a9c6292ce8b3d2a ]

During offline processing two worker threads are canceled without
freeing the device reference which leads to a hanging offline process.

Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 5ede251..4f96661 100644 (file)
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -2032,8 +2032,11 @@ static int dasd_eckd_basic_to_ready(struct dasd_device *device)
 
 static int dasd_eckd_online_to_ready(struct dasd_device *device)
 {
-       cancel_work_sync(&device->reload_device);
-       cancel_work_sync(&device->kick_validate);
+       if (cancel_work_sync(&device->reload_device))
+               dasd_put_device(device);
+       if (cancel_work_sync(&device->kick_validate))
+               dasd_put_device(device);
+
        return 0;
 };