[SCSI] qla2xxx: Reject loopback request if one is already in progress.

If another function on the port has initiated a loopback operation do not
process the current request.

Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

2 files changed, 9 insertions, 1 deletions

diff --git a/drivers/scsi/qla2xxx/qla_bsg.c b/drivers/scsi/qla2xxx/qla_bsg.c
index f7cb6a3fa7d4..5b49766e0ae7 100644
--- a/drivers/scsi/qla2xxx/qla_bsg.c
+++ b/drivers/scsi/qla2xxx/qla_bsg.c
@@ -746,6 +746,14 @@ qla2x00_process_loopback(struct fc_bsg_job *bsg_job)
                                 goto done_free_dma_rsp;
                         }
 
+                        if ((config[0] & INTERNAL_LOOPBACK_MASK) != 0) {
+                                ql_dbg(ql_dbg_user, vha, 0x70c4,
+                                    "Loopback operation already in "
+                                    "progress.\n");
+                                rval = -EAGAIN;
+                                goto done_free_dma_rsp;
+                        }
+
                         ql_dbg(ql_dbg_user, vha, 0x70c0,
                             "elreq.options=%04x\n", elreq.options);
 
diff --git a/drivers/scsi/qla2xxx/qla_dbg.c b/drivers/scsi/qla2xxx/qla_dbg.c
index af045ed0a230..c1d2310c615e 100644
--- a/drivers/scsi/qla2xxx/qla_dbg.c
+++ b/drivers/scsi/qla2xxx/qla_dbg.c
@@ -24,7 +24,7 @@
  * | Async Events                 |       0x5071       | 0x502b-0x502f  |
  * |                              |                    | 0x5047,0x5052  |
  * | Timer Routines               |       0x6011       |                |
- * | User Space Interactions      |       0x70c3       | 0x7018,0x702e, |
+ * | User Space Interactions      |       0x70c4       | 0x7018,0x702e, |
  * |                              |                    | 0x7020,0x7024, |
  * |                              |                    | 0x7039,0x7045, |
  * |                              |                    | 0x7073-0x7075, |