This is a note to let you know that I've just added the patch titled
scsi: storvsc: Fix scsi_cmd error assignments in storvsc_handle_error
to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: scsi-storvsc-fix-scsi_cmd-error-assignments-in-storvsc_handle_error.patch and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Wed Feb 28 16:13:29 CET 2018
From: Cathy Avery cavery@redhat.com Date: Tue, 19 Dec 2017 13:32:48 -0500 Subject: scsi: storvsc: Fix scsi_cmd error assignments in storvsc_handle_error
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 @@ -915,10 +915,11 @@ 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;
Patches currently in stable-queue which might be from cavery@redhat.com are
queue-4.9/scsi-storvsc-fix-scsi_cmd-error-assignments-in-storvsc_handle_error.patch