4.9-stable review patch. If anyone has any objections, please let me know.
------------------
[ Upstream commit 14fa91e0fef8e4d6feb8b1fa2a807828e0abe815 ]
netdev_wait_allrefs() could rebroadcast NETDEV_UNREGISTER event multiple times until all refs are gone, which will result in calling ipoib_delete_debug_files multiple times and printing a warning.
Remove the WARN_ONCE since checks of NULL pointers before calling debugfs_remove are not needed.
Fixes: 771a52584096 ("IB/IPoIB: ibX: failed to create mcg debug file") Signed-off-by: Alaa Hleihel alaa@mellanox.com Signed-off-by: Leon Romanovsky leon@kernel.org Reviewed-by: Dennis Dalessandro dennis.dalessandro@intel.com Signed-off-by: Jason Gunthorpe jgg@mellanox.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/infiniband/ulp/ipoib/ipoib_fs.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_fs.c b/drivers/infiniband/ulp/ipoib/ipoib_fs.c index 09396bd7b02d..63be3bcdc0e3 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_fs.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_fs.c @@ -281,8 +281,6 @@ void ipoib_delete_debug_files(struct net_device *dev) { struct ipoib_dev_priv *priv = netdev_priv(dev);
- WARN_ONCE(!priv->mcg_dentry, "null mcg debug file\n"); - WARN_ONCE(!priv->path_dentry, "null path debug file\n"); debugfs_remove(priv->mcg_dentry); debugfs_remove(priv->path_dentry); priv->mcg_dentry = priv->path_dentry = NULL;