Commit 98733791 authored Jul 17, 2015 by Martin Schwidefsky

s390/zcrypt: fix device unregister race



The ap_queue_messsage function will call device_unregister if the
unregistered field of the device has been set while trying to queue
a message. This races with other device_unregister calls, e.g. from
the ap_scan_bus. Remove the call to device_unregister from
ap_queue_message and let ap_scan_bus deal with it.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

parent 889875a1

drivers/s390/crypto/ap_bus.c

+0 −2

Original line number	Diff line number	Diff line
		@@ -1666,8 +1666,6 @@ void ap_queue_message(struct ap_device ap_dev, struct ap_message ap_msg)
		rc = -ENODEV;
		}
		spin_unlock_bh(&ap_dev->lock);
		if (rc == -ENODEV)
		device_unregister(&ap_dev->device);
		}
		EXPORT_SYMBOL(ap_queue_message);

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