[S390] cio: ensure proper locking during device recognition
Device recognition needs to be started with the ccw device lock held to prevent race conditions between I/O starting and interrupt reception. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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@ -488,7 +488,9 @@ static int online_store_recog_and_online(struct ccw_device *cdev)
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{
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/* Do device recognition, if needed. */
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if (cdev->private->state == DEV_STATE_BOXED) {
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spin_lock_irq(cdev->ccwlock);
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ccw_device_recognition(cdev);
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spin_unlock_irq(cdev->ccwlock);
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wait_event(cdev->private->wait_q,
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cdev->private->flags.recog_done);
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if (cdev->private->state != DEV_STATE_OFFLINE)
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