diff options
| author | Darrick J. Wong <djwong@us.ibm.com> | 2010-10-01 13:55:47 -0700 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2010-10-08 16:03:42 -0500 |
| commit | 56dd2c0691a5a387b7b05835fe547dc6fade9407 (patch) | |
| tree | d7ff3abef5b42f554128b30072aaa1e2aa7eab08 /drivers/scsi/libsas/sas_ata.c | |
| parent | 39a985547cbfcbb0b23667b69b8ae82a6cf312ac (diff) | |
[SCSI] libsas: Don't issue commands to devices that have been hot-removed
sd will get hung up issuing commands to flush write cache if a SAS
device behind the expander is unplugged without warning. Change libsas
to reject commands to domain devices that have already gone away.
[maciej.trela@intel.com: removed setting ->gone in sas_deform_port() to
permit sync cache commands at module removal]
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Tested-by: Haipao Fan <haipao.fan@intel.com>
Signed-off-by: Maciej Trela <maciej.trela@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/libsas/sas_ata.c')
| -rw-r--r-- | drivers/scsi/libsas/sas_ata.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c index ddbade7beec9..e1a395b438ee 100644 --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -162,6 +162,10 @@ static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) unsigned int xfer = 0; unsigned int si; + /* If the device fell off, no sense in issuing commands */ + if (dev->gone) + return AC_ERR_SYSTEM; + task = sas_alloc_task(GFP_ATOMIC); if (!task) return AC_ERR_SYSTEM; |