Commit 9a9b8112 authored by Feras Daoud's avatar Feras Daoud Committed by Doug Ledford

IB/ipoib: Update broadcast object if PKey value was changed in index 0

Update the broadcast address in the priv->broadcast object when the
Pkey value changes in index 0, otherwise the multicast GID value will
keep the previous value of the PKey, and will not be updated.
This leads to interface state down because the interface will keep the
old PKey value.

For example, in SR-IOV environment, if the PF changes the value of PKey
index 0 for one of the VFs, then the VF receives PKey change event that
triggers heavy flush. This flush calls update_parent_pkey that update the
broadcast object and its relevant members. If in this case the multicast
GID will not be updated, the interface state will be down.

Fixes: c2904141 ("IPoIB: Fix pkey change flow for virtualization environments")
Signed-off-by: default avatarFeras Daoud <ferasda@mellanox.com>
Signed-off-by: default avatarErez Shitrit <erezsh@mellanox.com>
Reviewed-by: default avatarAlex Vesker <valex@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 4ed6ad1e
...@@ -978,6 +978,19 @@ static inline int update_parent_pkey(struct ipoib_dev_priv *priv) ...@@ -978,6 +978,19 @@ static inline int update_parent_pkey(struct ipoib_dev_priv *priv)
*/ */
priv->dev->broadcast[8] = priv->pkey >> 8; priv->dev->broadcast[8] = priv->pkey >> 8;
priv->dev->broadcast[9] = priv->pkey & 0xff; priv->dev->broadcast[9] = priv->pkey & 0xff;
/*
* Update the broadcast address in the priv->broadcast object,
* in case it already exists, otherwise no one will do that.
*/
if (priv->broadcast) {
spin_lock_irq(&priv->lock);
memcpy(priv->broadcast->mcmember.mgid.raw,
priv->dev->broadcast + 4,
sizeof(union ib_gid));
spin_unlock_irq(&priv->lock);
}
return 0; return 0;
} }
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment