From: Shannon Nelson <snelson@pensando.io>
Date: Fri, 20 Mar 2020 02:31:50 +0000 (-0700)
Subject: ionic: only save good lif dentry
X-Git-Tag: v5.7-rc1~146^2~111^2~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0e1825f48ca7d38b7957b231148c7bd8c55fefed;p=thirdparty%2Flinux.git

ionic: only save good lif dentry

Don't save the lif->dentry until we know we have
a good value.

Fixes: 1a58e196467f ("ionic: Add basic lif support")
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_debugfs.c b/drivers/net/ethernet/pensando/ionic/ionic_debugfs.c
index bc03cecf80cc9..5f8fc58d42b3d 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_debugfs.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_debugfs.c
@@ -228,7 +228,13 @@ DEFINE_SHOW_ATTRIBUTE(netdev);
 
 void ionic_debugfs_add_lif(struct ionic_lif *lif)
 {
-	lif->dentry = debugfs_create_dir(lif->name, lif->ionic->dentry);
+	struct dentry *lif_dentry;
+
+	lif_dentry = debugfs_create_dir(lif->name, lif->ionic->dentry);
+	if (IS_ERR_OR_NULL(lif_dentry))
+		return;
+	lif->dentry = lif_dentry;
+
 	debugfs_create_file("netdev", 0400, lif->dentry,
 			    lif->netdev, &netdev_fops);
 }