scsi: mpi3mr: Fix a NULL vs IS_ERR() bug in mpi3mr_bsg_init()

The bsg_setup_queue() function does not return NULL.  It returns error
pointers.  Fix the check accordingly.

Link: https://lore.kernel.org/r/YnUf7RQl+A3tigWh@kili
Fixes: 4268fa75 ("scsi: mpi3mr: Add bsg device support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mpi3mr/mpi3mr_app.c

@@ -1540,7 +1540,7 @@ void mpi3mr_bsg_init(struct mpi3mr_ioc *mrioc)
 
 	mrioc->bsg_queue = bsg_setup_queue(mrioc->bsg_dev, dev_name(mrioc->bsg_dev),
 			mpi3mr_bsg_request, NULL, 0);
-	if (!mrioc->bsg_queue) {
+	if (IS_ERR(mrioc->bsg_queue)) {
 		ioc_err(mrioc, "%s: bsg registration failed\n",
 		    dev_name(mrioc->bsg_dev));
 		goto err_setup_queue;