Hi all,
For detecting a failure to transmit initial dev to host FIS as described in
section G.5 of sas-2 r 04b , In order to generate the dev to host FIS, we
send a link reset to the expander port, but this may still fail for some
device, when this happened , we should ignore this , do not set the phy, let
libsas find the device later .
>From a315c8ee6f6b7ad000d6dc72d31dfb576ecbceb5 Mon Sep 17 00:00:00 2001
From: Jack Wang <jack_wang@xxxxxxxxx>
Date: Tue, 27 Dec 2011 02:25:19 -0500
Subject: [PATCH] don't set the invalid phy
Signed-off-by: Lindar Liu <Lindar_liu@xxxxxxxxx>
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 e47599b..c7a27c7 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -304,6 +304,12 @@ static int sas_ex_phy_discover_helper(struct
domain_device *dev, u8 *disc_req,
/* Wait for the reset to trigger the negotiation */
msleep(500);
}
+ if ((dr->attached_dev_type == 0 &&
+ dr->attached_sata_dev)) {
+ sas_printk("Found sata attached_dev_type = 0, ignore it to
let it found later!\n");
+ return 0;
+ }
+
sas_set_ex_phy(dev, single, disc_resp);
return 0;
}
--
1.7.1
Attachment:
0001-don-t-set-the-invalid-phy.patch
Description: Binary data
