On Tuesday 27 November 2007 08:21, Roland Dreier wrote:
> Linus, please pull from
>
> master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband.git for-linus
>
>
> Jack Morgenstein (1):
> mlx4_core: Fix state check in mlx4_qp_modify()
>
MUST also enter the patch I send yesterday:
[PATCH] ipoib: fix kernel Oops resulting from xmit when priv->broadcast is NULL.
(critical bug fix -- will get kernel Oopses whenever ports on the network go down!).
(patch given again below)
- Jack
======================================================================================================================
IPoIB: Fix kernel Oops resulting from xmit following dev_down.
If a port goes down, ipoib_ib_dev_down is invoked -- which flushed the mcasts (clearing
priv->broadcast) and clearing the path record cache. If ipoib_start_xmit is then invoked (before
the port is upped), a kernel Oops results from attempting to access priv->broadcast.
Returning NULL if priv->broadcast is NULL is a harmless way of bypassing the problem -- the
offending packet is simply discarded "without prejudice".
Signed-off-by: Jack Morgenstein <[email protected]>
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index a03a65e..c9f6077 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -460,6 +460,9 @@ static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid)
struct ipoib_dev_priv *priv = netdev_priv(dev);
struct ipoib_path *path;
+ if (!priv->broadcast)
+ return NULL;
+
path = kzalloc(sizeof *path, GFP_ATOMIC);
if (!path)
return NULL;
-
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