scsi: storvsc: Fix scsi_cmd error assignments in storvsc_handle_error

When an I/O is returned with an srb_status of SRB_STATUS_INVALID_LUN
which has zero good_bytes it must be assigned an error. Otherwise the
I/O will be continuously requeued and will cause a deadlock in the case
where disks are being hot added and removed. sd_probe_async will wait
forever for its I/O to complete while holding scsi_sd_probe_domain.

Also returning the default error of DID_TARGET_FAILURE causes multipath
to not retry the I/O resulting in applications receiving I/O errors
before a failover can occur.

Signed-off-by: Cathy Avery <cavery@redhat.com>
Signed-off-by: Long Li <longli@microsoft.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 1b06cf0375dcdbd6f1780ab7535bbaa4c5742916..3b3d1d050cacaa3d83dc615e29691ccc2c5de87f 100644 (file)
--- a/drivers/scsi/storvsc_drv.c
+++ b/drivers/scsi/storvsc_drv.c
@@ -953,10 +953,11 @@ static void storvsc_handle_error(struct vmscsi_request *vm_srb,
                case TEST_UNIT_READY:
                        break;
                default:
-                       set_host_byte(scmnd, DID_TARGET_FAILURE);
+                       set_host_byte(scmnd, DID_ERROR);
                }
                break;
        case SRB_STATUS_INVALID_LUN:
+               set_host_byte(scmnd, DID_NO_CONNECT);
                do_work = true;
                process_err_fn = storvsc_remove_lun;
                break;