Fix oinkmaster patch.

[ipfire-2.x.git] / src / patches / suse-2.6.27.39 / patches.drivers / ibmvfc-add_sync.patch

Subject: Fix errors due to inconsistent command data
From: Brian J. King <brking@us.ibm.com>
References: 456654 - LTC50451

In order to ensure the VIOS sees a consistent command buffer, we
need to add a memory barrier after building the command buffer
but before sending the command.

Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: Olaf Hering <olh@suse.de>
---

 drivers/scsi/ibmvscsi/ibmvfc.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -1381,6 +1381,8 @@ static int ibmvfc_send_event(struct ibmv
 		add_timer(&evt->timer);
 	}
 
+	mb();
+
 	if ((rc = ibmvfc_send_crq(vhost, crq_as_u64[0], crq_as_u64[1]))) {
 		list_del(&evt->queue);
 		del_timer(&evt->timer);