Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 3.18 08/24] scsi: storvsc: Fix scsi_cmd error assignments in storvsc_handle_error | Date | Fri, 2 Mar 2018 09:51:05 +0100 |
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3.18-stable review patch. If anyone has any objections, please let me know.
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From: Cathy Avery <cavery@redhat.com>
[ Upstream commit d1b8b2391c24751e44f618fcf86fb55d9a9247fd ]
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> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/scsi/storvsc_drv.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -1029,10 +1029,11 @@ static void storvsc_handle_error(struct 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;
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