bsg: provide bsg_remove_queue() helper

All drivers do unregister + cleanup, provide a helper for that.

Cc: linux-scsi@vger.kernel.org
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Benjamin Block <bblock@linux.vnet.ibm.com>
Tested-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

block/bsg-lib.c

@@ -296,6 +296,15 @@ static void bsg_exit_rq(struct request_queue *q, struct request *req)
 	kfree(job->reply);
 }
 
+void bsg_remove_queue(struct request_queue *q)
+{
+	if (q) {
+		bsg_unregister_queue(q);
+		blk_cleanup_queue(q);
+	}
+}
+EXPORT_SYMBOL_GPL(bsg_remove_queue);
+
 /**
  * bsg_setup_queue - Create and add the bsg hooks so we can receive requests
  * @dev: device to attach bsg device to

drivers/scsi/scsi_transport_fc.c

@@ -3851,10 +3851,7 @@ fc_bsg_rportadd(struct Scsi_Host *shost, struct fc_rport *rport)
 static void
 fc_bsg_remove(struct request_queue *q)
 {
-	if (q) {
-		bsg_unregister_queue(q);
-		blk_cleanup_queue(q);
-	}
+	bsg_remove_queue(q);
 }
 
 

drivers/scsi/scsi_transport_iscsi.c

@@ -1576,10 +1576,7 @@ static int iscsi_remove_host(struct transport_container *tc,
 	struct Scsi_Host *shost = dev_to_shost(dev);
 	struct iscsi_cls_host *ihost = shost->shost_data;
 
-	if (ihost->bsg_q) {
-		bsg_unregister_queue(ihost->bsg_q);
-		blk_cleanup_queue(ihost->bsg_q);
-	}
+	bsg_remove_queue(ihost->bsg_q);
 	return 0;
 }
 

drivers/scsi/scsi_transport_sas.c

@@ -246,11 +246,7 @@ static int sas_host_remove(struct transport_container *tc, struct device *dev,
 	struct Scsi_Host *shost = dev_to_shost(dev);
 	struct request_queue *q = to_sas_host_attrs(shost)->q;
 
-	if (q) {
-		bsg_unregister_queue(q);
-		blk_cleanup_queue(q);
-	}
-
+	bsg_remove_queue(q);
 	return 0;
 }
 

drivers/scsi/ufs/ufs_bsg.c

@@ -157,7 +157,7 @@ void ufs_bsg_remove(struct ufs_hba *hba)
 	if (!hba->bsg_queue)
 		return;
 
-	bsg_unregister_queue(hba->bsg_queue);
+	bsg_remove_queue(hba->bsg_queue);
 
 	device_del(bsg_dev);
 	put_device(bsg_dev);

include/linux/bsg-lib.h

@@ -73,6 +73,7 @@ void bsg_job_done(struct bsg_job *job, int result,
 		  unsigned int reply_payload_rcv_len);
 struct request_queue *bsg_setup_queue(struct device *dev, const char *name,
 		bsg_job_fn *job_fn, rq_timed_out_fn *timeout, int dd_job_size);
+void bsg_remove_queue(struct request_queue *q);
 void bsg_job_put(struct bsg_job *job);
 int __must_check bsg_job_get(struct bsg_job *job);