When alloc urb fail in the same function uas_submit_urbs,
whether we should replace SCSI_MLQUEUE_DEVICE_BUSY with generic
error code -ENOMEM? Such like this:
@@ -572,7 +571,7 @@ static int uas_submit_urbs(struct scsi_cmnd *cmnd,
cmdinfo->data_in_urb = uas_alloc_data_urb(devinfo, GFP_ATOMIC,
cmnd, DMA_FROM_DEVICE);
if (!cmdinfo->data_in_urb)
- return SCSI_MLQUEUE_DEVICE_BUSY;
+ return -ENOMEM;
cmdinfo->state &= ~ALLOC_DATA_IN_URB;
}