diff mbox series

[4/5] vhost scsi: add lun parser helper

Message ID 1604986403-4931-5-git-send-email-michael.christie@oracle.com (mailing list archive)
State New, archived
Headers show
Series vhost-scsi: IO error fixups | expand

Commit Message

Mike Christie Nov. 10, 2020, 5:33 a.m. UTC 
Move code to parse lun from req's lun_buf to helper, so tmf code
can use it in the next patch.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
---
 drivers/vhost/scsi.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c
index 5d8850f..ed7dc6b 100644
--- a/drivers/vhost/scsi.c
+++ b/drivers/vhost/scsi.c
@@ -898,6 +898,11 @@  static void vhost_scsi_submission_work(struct work_struct *work)
 	return ret;
 }
 
+static u16 vhost_buf_to_lun(u8 *lun_buf)
+{
+	return ((lun_buf[2] << 8) | lun_buf[3]) & 0x3FFF;
+}
+
 static void
 vhost_scsi_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq)
 {
@@ -1036,12 +1041,12 @@  static void vhost_scsi_submission_work(struct work_struct *work)
 			tag = vhost64_to_cpu(vq, v_req_pi.tag);
 			task_attr = v_req_pi.task_attr;
 			cdb = &v_req_pi.cdb[0];
-			lun = ((v_req_pi.lun[2] << 8) | v_req_pi.lun[3]) & 0x3FFF;
+			lun = vhost_buf_to_lun(v_req_pi.lun);
 		} else {
 			tag = vhost64_to_cpu(vq, v_req.tag);
 			task_attr = v_req.task_attr;
 			cdb = &v_req.cdb[0];
-			lun = ((v_req.lun[2] << 8) | v_req.lun[3]) & 0x3FFF;
+			lun = vhost_buf_to_lun(v_req.lun);
 		}
 		/*
 		 * Check that the received CDB size does not exceeded our