scsi: osd_uld: Check scsi_device_get() return value

scsi_device_get() can fail. Hence check its return value.

Signed-off-by: Bart Van Assche <[e-mail]>
Cc: Boaz Harrosh <[e-mail]>
Acked-by: Boaz Harrosh <[e-mail]>
Signed-off-by: Martin K. Petersen <[e-mail]>

drivers/scsi/osd/osd_uld.c

···
 	/* hold one more reference to the scsi_device that will get released
 	 * in __release, in case a logout is happening while fs is mounted
 	 */
-	scsi_device_get(scsi_device);
+	if (scsi_device_get(scsi_device))
+		goto err_put_disk;
 	osd_dev_init(&oud->od, scsi_device);
 
 	/* Detect the OSD Version */
 	error = __detect_osd(oud);
 	if (error) {
 		OSD_ERR("osd detection failed, non-compatible OSD device\n");
-		goto err_put_disk;
+		goto err_put_sdev;
 	}
 
 	/* init the char-device for communication with user-mode */
···
 
 err_put_cdev:
 	cdev_del(&oud->cdev);
-err_put_disk:
+err_put_sdev:
 	scsi_device_put(scsi_device);
+err_put_disk:
 	put_disk(disk);
 err_free_osd:
 	dev_set_drvdata(dev, NULL);