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Date: Tue, 26 Jul 2011 23:10:48 -0700 (PDT)
From: Luben Tuikov <ltuikov@...oo.com>
To: "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"JBottomley@...allels.com" <JBottomley@...allels.com>,
Jack Wang <jack_wang@...sh.com>
Subject: [PATCH] [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@...oo.com>
Reviewed-by: Jack Wang <jack_wang@...sh.com>
---
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 874e29d..f84084b 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;
}
--
1.7.2.2.165.gbc382
--
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