[SCSI] libsas: continue revalidation

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.

Cc: <stable@vger.kernel.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index af659cc8308c..63c574227ebf 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -2114,9 +2114,7 @@ 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;
 
@@ -2128,8 +2126,10 @@ 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;
 }