Change qemu to a version that support kvm and kqemu.

[people/pmueller/ipfire-2.x.git] / src / patches / suse-2.6.27.31 / patches.fixes / libiscsi-fix-null-pointer-in-fail-all-commands

From: Mike Christie <michaelc@cs.wisc.edu>
Date: Thu Mar 5 14:46:07 2009 -0600
X-Git: 728996829b3e2a3bbacb7390e6c040dd839cdf21
Subject: libiscsi: fix possbile null ptr session command cleanup
References: bnc#498369

If the iscsi eh fires when the current task is a nop, then
the task->sc pointer is null. fail_all_commands could
then try to do task->sc->device and oops. We actually do
not need to access the curr task in this path, because
if it is a cmd task the fail_command call will handle
this and if it is mgmt task then the flush of the mgmt
queues will handle that.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>

---
 drivers/scsi/libiscsi.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -1498,8 +1498,11 @@ static void fail_all_commands(struct isc
 {
 	struct iscsi_task *task, *tmp;
 
-	if (conn->task && (conn->task->sc->device->lun == lun || lun == -1))
-		conn->task = NULL;
+	if (conn->task) {
+		if (lun == -1 ||
+		    (conn->task->sc && conn->task->sc->device->lun == lun))
+			conn->task = NULL;
+	}
 
 	/* flush pending */
 	list_for_each_entry_safe(task, tmp, &conn->xmitqueue, running) {