Two simple fixes, both of which cause I/O hangs. The storvsc one is
from the hyper-v which can hang under certain hot add/remove conditions
and the other is generally, where removing a target and a device in
close proximity can result in the release method being executed twice
(and subsequent list and other corruption and an eventual panic).
The patch is available here:
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git scsi-fixes
The short changelog is:
Cathy Avery (1):
scsi: storvsc: Fix scsi_cmd error assignments in storvsc_handle_error
Hannes Reinecke (1):
scsi: core: check for device state in __scsi_remove_target()
And the diffstat:
drivers/scsi/scsi_sysfs.c | 5 ++++-
drivers/scsi/storvsc_drv.c | 3 ++-
2 files changed, 6 insertions(+), 2 deletions(-)
With full diff below.
James
---
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index a9996c16f4ae..26ce17178401 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -1415,7 +1415,10 @@ static void __scsi_remove_target(struct scsi_target
*starget)
* check.
*/
if (sdev->channel != starget->channel ||
- sdev->id != starget->id ||
+ sdev->id != starget->id)
+ continue;
+ if (sdev->sdev_state == SDEV_DEL ||
+ sdev->sdev_state == SDEV_CANCEL ||
!get_device(&sdev->sdev_gendev))
continue;
spin_unlock_irqrestore(shost->host_lock, flags);
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c
index 1b06cf0375dc..3b3d1d050cac 100644
--- 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;
