4.9-stable review patch. If anyone has any objections, please let me know.
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From: Alex Estrin alex.estrin@intel.com
[ Upstream commit 1029361084d18cc270f64dfd39529fafa10cfe01 ]
On reboot SM can program port pkey table before ipoib registered its event handler, which could result in missing pkey event and leave root interface with initial pkey value from index 0.
Since OPA port starts with invalid pkey in index 0, root interface will fail to initialize and stay down with no-carrier flag.
For IB ipoib interface may end up with pkey different from value opensm put in pkey table idx 0, resulting in connectivity issues (different mcast groups, for example).
Close the window by calling event handler after registration to make sure ipoib pkey is in sync with port pkey table.
Reviewed-by: Mike Marciniszyn mike.marciniszyn@intel.com Reviewed-by: Ira Weiny ira.weiny@intel.com Signed-off-by: Alex Estrin alex.estrin@intel.com Signed-off-by: Dennis Dalessandro dennis.dalessandro@intel.com Signed-off-by: Jason Gunthorpe jgg@mellanox.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/infiniband/ulp/ipoib/ipoib_main.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c @@ -2119,6 +2119,9 @@ static struct net_device *ipoib_add_port goto event_failed; }
+ /* call event handler to ensure pkey in sync */ + queue_work(ipoib_workqueue, &priv->flush_heavy); + result = register_netdev(priv->dev); if (result) { printk(KERN_WARNING "%s: couldn't register ipoib port %d; error %d\n",