[SCSI] bsg: fix bsg_unregister_queue
scsi_sysfs_add_sdev ignores the bsg_register_queue failure, so bsg_unregister_queue must check whether the queue has a bsg device. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
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@ -932,7 +932,8 @@ void bsg_unregister_queue(struct request_queue *q)
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{
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struct bsg_class_device *bcd = &q->bsg_dev;
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WARN_ON(!bcd->class_dev);
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if (!bcd->class_dev)
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return;
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mutex_lock(&bsg_mutex);
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sysfs_remove_link(&q->kobj, "bsg");
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