linux-kernel - [PATCH] media: omap2: omapfb: fix ifnullfree.cocci warnings

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Message-ID: <20180725175700.GA83136@lkp-sb05.lkp.intel.com>
Date:   Thu, 26 Jul 2018 01:57:00 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Mauro Carvalho Chehab <m.chehab@...sung.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Arnd Bergmann <arnd@...db.de>, linux-omap@...r.kernel.org,
        linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org
Subject: [PATCH] media: omap2: omapfb: fix ifnullfree.cocci warnings

From: kbuild test robot <fengguang.wu@...el.com>

drivers/video/fbdev/omap2/omapfb/dss/core.c:141:2-26: WARNING: NULL check before some freeing functions is not needed.

 NULL check before some freeing functions is not needed.

 Based on checkpatch warning
 "kfree(NULL) is safe this check is probably not required"
 and kfreeaddr.cocci by Julia Lawall.

Generated by: scripts/coccinelle/free/ifnullfree.cocci

Fixes: 7378f1149884 ("media: omap2: omapfb: allow building it with COMPILE_TEST")
Signed-off-by: kbuild test robot <fengguang.wu@...el.com>
---

Please take the patch only if it's a positive warning. Thanks!

 core.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/video/fbdev/omap2/omapfb/dss/core.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/core.c
@@ -137,8 +137,7 @@ static int dss_initialize_debugfs(void)
 
 static void dss_uninitialize_debugfs(void)
 {
-	if (dss_debugfs_dir)
-		debugfs_remove_recursive(dss_debugfs_dir);
+	debugfs_remove_recursive(dss_debugfs_dir);
 }
 
 int dss_debugfs_create_file(const char *name, void (*write)(struct seq_file *))