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_expander.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_expander.c')
| -rw-r--r-- | drivers/scsi/libsas/sas_expander.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index 83dd5070a15c..61d81f858a5a 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -1724,6 +1724,7 @@ static void sas_unregister_ex_tree(struct domain_device *dev) struct domain_device *child, *n; list_for_each_entry_safe(child, n, &ex->children, siblings) { + child->gone = 1; if (child->dev_type == EDGE_DEV || child->dev_type == FANOUT_DEV) sas_unregister_ex_tree(child); @@ -1744,6 +1745,7 @@ static void sas_unregister_devs_sas_addr(struct domain_device *parent, &ex_dev->children, siblings) { if (SAS_ADDR(child->sas_addr) == SAS_ADDR(phy->attached_sas_addr)) { + child->gone = 1; if (child->dev_type == EDGE_DEV || child->dev_type == FANOUT_DEV) sas_unregister_ex_tree(child); @@ -1752,6 +1754,7 @@ static void sas_unregister_devs_sas_addr(struct domain_device *parent, break; } } + parent->gone = 1; sas_disable_routing(parent, phy->attached_sas_addr); } memset(phy->attached_sas_addr, 0, SAS_ADDR_SIZE); |