Merge branch 'Networking-driver-debugfs-cleanups'

Greg Kroah-Hartman says:

====================
Networking driver debugfs cleanups

There is no need to test the result of any debugfs call anymore.  The
debugfs core warns the user if something fails, and the return value of
a debugfs call can always be fed back into another debugfs call with no
problems.

Also, debugfs is for debugging, so if there are problems with debugfs
(i.e. the system is out of memory) the rest of the kernel should not
change behavior, so testing for debugfs calls is pointless and not the
goal of debugfs at all.

This series cleans up a lot of networking drivers and some wimax code
that was calling debugfs and trying to do something with the return
value that it didn't need to.  Removing this logic makes the code
smaller, easier to understand, and use less run-time memory in some
cases, all good things.

The series is against net-next, and have no dependancies between any of
them if they want to go through any random tree/order.  Or, if wanted,
I can take them through my driver-core tree where other debugfs cleanups
are being slowly fed during major merge windows.

v3: fix build warning in i2400m, I thought I had caught them all :(
    add acks from some reviewers

v2: fix up build warnings, it's as if I never even built these.  Ugh, so
    sorry for wasting people's time with the v1 series.  I need to stop
    relying on 0-day as it isn't working well anymore :(
====================

Signed-off-by: David S. Miller <[email protected]>

2 files changed, 7 insertions, 50 deletions

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c
index a027f4a9d0cc..a9afe46b837f 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.c
@@ -164,70 +164,30 @@ static const struct file_operations dpaa2_dbg_ch_ops = {
 
 void dpaa2_dbg_add(struct dpaa2_eth_priv *priv)
 {
-	if (!dpaa2_dbg_root)
-		return;
+	struct dentry *dir;
 
 	/* Create a directory for the interface */
-	priv->dbg.dir = debugfs_create_dir(priv->net_dev->name,
-					   dpaa2_dbg_root);
-	if (!priv->dbg.dir) {
-		netdev_err(priv->net_dev, "debugfs_create_dir() failed\n");
-		return;
-	}
+	dir = debugfs_create_dir(priv->net_dev->name, dpaa2_dbg_root);
+	priv->dbg.dir = dir;
 
 	/* per-cpu stats file */
-	priv->dbg.cpu_stats = debugfs_create_file("cpu_stats", 0444,
-						  priv->dbg.dir, priv,
-						  &dpaa2_dbg_cpu_ops);
-	if (!priv->dbg.cpu_stats) {
-		netdev_err(priv->net_dev, "debugfs_create_file() failed\n");
-		goto err_cpu_stats;
-	}
+	debugfs_create_file("cpu_stats", 0444, dir, priv, &dpaa2_dbg_cpu_ops);
 
 	/* per-fq stats file */
-	priv->dbg.fq_stats = debugfs_create_file("fq_stats", 0444,
-						 priv->dbg.dir, priv,
-						 &dpaa2_dbg_fq_ops);
-	if (!priv->dbg.fq_stats) {
-		netdev_err(priv->net_dev, "debugfs_create_file() failed\n");
-		goto err_fq_stats;
-	}
+	debugfs_create_file("fq_stats", 0444, dir, priv, &dpaa2_dbg_fq_ops);
 
 	/* per-fq stats file */
-	priv->dbg.ch_stats = debugfs_create_file("ch_stats", 0444,
-						 priv->dbg.dir, priv,
-						 &dpaa2_dbg_ch_ops);
-	if (!priv->dbg.fq_stats) {
-		netdev_err(priv->net_dev, "debugfs_create_file() failed\n");
-		goto err_ch_stats;
-	}
-
-	return;
-
-err_ch_stats:
-	debugfs_remove(priv->dbg.fq_stats);
-err_fq_stats:
-	debugfs_remove(priv->dbg.cpu_stats);
-err_cpu_stats:
-	debugfs_remove(priv->dbg.dir);
+	debugfs_create_file("ch_stats", 0444, dir, priv, &dpaa2_dbg_ch_ops);
 }
 
 void dpaa2_dbg_remove(struct dpaa2_eth_priv *priv)
 {
-	debugfs_remove(priv->dbg.fq_stats);
-	debugfs_remove(priv->dbg.ch_stats);
-	debugfs_remove(priv->dbg.cpu_stats);
-	debugfs_remove(priv->dbg.dir);
+	debugfs_remove_recursive(priv->dbg.dir);
 }
 
 void dpaa2_eth_dbg_init(void)
 {
 	dpaa2_dbg_root = debugfs_create_dir(DPAA2_ETH_DBG_ROOT, NULL);
-	if (!dpaa2_dbg_root) {
-		pr_err("DPAA2-ETH: debugfs create failed\n");
-		return;
-	}
-
 	pr_debug("DPAA2-ETH: debugfs created\n");
 }
 
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.h b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.h
index 4f63de997a26..15598b28f03b 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.h
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth-debugfs.h
@@ -11,9 +11,6 @@ struct dpaa2_eth_priv;
 
 struct dpaa2_debugfs {
 	struct dentry *dir;
-	struct dentry *fq_stats;
-	struct dentry *ch_stats;
-	struct dentry *cpu_stats;
 };
 
 #ifdef CONFIG_DEBUG_FS