diff options
| author | Olaf Hering <olaf@aepfle.de> | 2013-02-21 12:04:51 -0800 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2013-02-24 09:39:44 +0000 |
| commit | 3e8f4f4065901c8dfc51407e1984495e1748c090 (patch) | |
| tree | 92e76f06fa74cb2ecfdf823342803234a4235c74 /drivers/scsi | |
| parent | 98f99a8ac8d92fef74b61e8dd25df934afbbf843 (diff) | |
| download | linux-3e8f4f4065901c8dfc51407e1984495e1748c090.tar.bz2 | |
[SCSI] storvsc: avoid usage of WRITE_SAME
Set scsi_device->no_write_same because the host does not support it.
Also blacklist WRITE_SAME to avoid (and log) accident usage.
If the guest uses the ext4 filesystem, storvsc hangs while it prints
these messages in an endless loop:
...
[ 161.459523] hv_storvsc vmbus_0_1: cmd 0x41 scsi status 0x2 srb status 0x6
[ 161.462157] sd 2:0:0:0: [sda]
[ 161.463135] Sense Key : No Sense [current]
[ 161.464983] sd 2:0:0:0: [sda]
[ 161.465899] Add. Sense: No additional sense information
[ 161.468211] hv_storvsc vmbus_0_1: cmd 0x41 scsi status 0x2 srb status 0x6
[ 161.475766] sd 2:0:0:0: [sda]
[ 161.476728] Sense Key : No Sense [current]
[ 161.478284] sd 2:0:0:0: [sda]
[ 161.479441] Add. Sense: No additional sense information
...
This happens with a guest running on Windows Server 2012, but happens to
work while running on Windows Server 2008. WRITE_SAME isnt really
supported by both versions, so disable the command usage globally.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/storvsc_drv.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/scsi/storvsc_drv.c b/drivers/scsi/storvsc_drv.c index 9f4e5601b610..82873e775fc3 100644 --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -1156,6 +1156,8 @@ static int storvsc_device_configure(struct scsi_device *sdevice) blk_queue_bounce_limit(sdevice->request_queue, BLK_BOUNCE_ANY); + sdevice->no_write_same = 1; + return 0; } @@ -1238,6 +1240,8 @@ static bool storvsc_scsi_cmd_ok(struct scsi_cmnd *scmnd) u8 scsi_op = scmnd->cmnd[0]; switch (scsi_op) { + /* the host does not handle WRITE_SAME, log accident usage */ + case WRITE_SAME: /* * smartd sends this command and the host does not handle * this. So, don't send it. |