From e8a58c706308409dec0ba21971d382dee4adc39e Mon Sep 17 00:00:00 2001
From: Jack Wang <jack_wang@xxxxxxxxx>
Date: Sat, 19 Feb 2011 17:52:24 +0800
Subject: [PATCH] Fix loopback topology bug during discovery
In some test envirenment, there is loopback topology test. We should
handle this during discovery.
Signed-off-by: Jack Wang <jack_wang@xxxxxxxxx>
---
drivers/scsi/libsas/sas_expander.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index 505ffe3..1a113c4 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -244,6 +244,12 @@ static int sas_ex_phy_discover_helper(struct domain_device *dev, u8 *disc_req,
* dev to host FIS as described in section G.5 of
* sas-2 r 04b */
dr = &((struct smp_resp *)disc_resp)->disc;
+ if (memcmp(dev->sas_addr, dr->attached_sas_addr,
+ SAS_ADDR_SIZE) == 0) {
+ sas_printk("Found loopback topology,"
+ "just ignore it!\n");
+ return 0;
+ }
if (!(dr->attached_dev_type == 0 &&
dr->attached_sata_dev))
break;
--
2011-02-19
jack_wang Attachment:
0001-Fix-loopback-topology-bug-during-discovery.patch
Description: Binary data
