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authorLuben Tuikov <ltuikov@yahoo.com>2011-07-26 23:10:48 -0700
committerJames Bottomley <JBottomley@Parallels.com>2011-07-27 15:50:58 +0400
commit5911e963d3718e306bcac387b83e259aa4228896 (patch)
tree1987f9c2d92087cf3ca2dbefb3724da6f3977864 /drivers/scsi/libsas
parente17035851ab8417bda890ab1e77f5ca121bbaa0b (diff)
downloadblackbird-obmc-linux-5911e963d3718e306bcac387b83e259aa4228896.tar.gz
blackbird-obmc-linux-5911e963d3718e306bcac387b83e259aa4228896.zip
[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>
Diffstat (limited to 'drivers/scsi/libsas')
-rw-r--r--drivers/scsi/libsas/sas_expander.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index 874e29d9533f..f84084bba2f0 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -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;
}
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