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[SCSI] libsas: remove expander from dev list on error 

If expander discovery fails (sas_discover_expander()), remove the
expander from the port device list (sas_ex_discover_expander()),
before freeing it. Else the list is corrupted and, e.g., when we
attempt to send SMP commands to other devices, the kernel oopses.

Signed-off-by: Luben Tuikov <ltuikov@yahoo.com>
Cc: stable@kernel.org
Reviewed-by: Jack Wang <jack_wang@usish.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Luben Tuikov 2011-07-26 23:10:48 -07:00 committed by James Bottomley
parent e17035851a
commit 5911e963d3
1 changed files with 3 additions and 0 deletions
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3
drivers/scsi/libsas/sas_expander.c
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@ -849,6 +849,9 @@ static struct domain_device *sas_ex_discover_expander(
res = sas_discover_expander(child);
if (res) {
spin_lock_irq(&parent->port->dev_list_lock);
list_del(&child->dev_list_node);
spin_unlock_irq(&parent->port->dev_list_lock);
kfree(child);
return NULL;
}