linux-kernel - [ 101/180] SCSI: libsas: continue revalidation

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Message-Id: <20121001225201.884628603@1wt.eu>
Date:	Tue, 02 Oct 2012 00:53:38 +0200
From:	Willy Tarreau <w@....eu>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Dan Williams <dan.j.williams@...el.com>,
	James Bottomley <JBottomley@...allels.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Willy Tarreau <w@....eu>
Subject: [ 101/180] SCSI: libsas: continue revalidation

2.6.32-longterm review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Williams <dan.j.williams@...el.com>

commit 26f2f199ff150d8876b2641c41e60d1c92d2fb81 upstream.

Continue running revalidation until no more broadcast devices are
discovered.  Fixes cases where re-discovery completes too early in a
domain with multiple expanders with pending re-discovery events.
Servicing BCNs can get backed up behind error recovery.

Signed-off-by: Dan Williams <dan.j.williams@...el.com>
Signed-off-by: James Bottomley <JBottomley@...allels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

commit 2da74cd8a6bad64d02207396c76d0939f3c57aaa upstream.
Signed-off-by: Willy Tarreau <w@....eu>
---
 drivers/scsi/libsas/sas_expander.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index b10ee2a..bac091d 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -1946,9 +1946,7 @@ int sas_ex_revalidate_domain(struct domain_device *port_dev)
 	struct domain_device *dev = NULL;
 
 	res = sas_find_bcast_dev(port_dev, &dev);
-	if (res)
-		goto out;
-	if (dev) {
+	while (res == 0 && dev) {
 		struct expander_device *ex = &dev->ex_dev;
 		int i = 0, phy_id;
 
@@ -1960,8 +1958,10 @@ int sas_ex_revalidate_domain(struct domain_device *port_dev)
 			res = sas_rediscover(dev, phy_id);
 			i = phy_id + 1;
 		} while (i < ex->num_phys);
+
+		dev = NULL;
+		res = sas_find_bcast_dev(port_dev, &dev);
 	}
-out:
 	return res;
 }
 
-- 
1.7.2.1.45.g54fbc



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