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[SCSI] libsas: Don't issue commands to devices that have been hot-removed

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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>
This commit is contained in:
Darrick J. Wong
2010-10-01 13:55:47 -07:00
committed by James Bottomley
parent 39a985547c
commit 56dd2c0691
4 changed files with 15 additions and 0 deletions
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include/scsi/libsas.h
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@ -205,6 +205,7 @@ struct domain_device {
};
void *lldd_dev;
int gone;
};
struct sas_discovery_event {