linux-kernel - [PATCH v1] drivers:mgb4:Fix the NULL vs IS_ERR() bug for debugfs_create

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Message-Id: <20240821071100.7839-1-11162571@vivo.com>
Date: Wed, 21 Aug 2024 03:10:58 -0400
From: Yang Ruibin <11162571@...o.com>
To: Martin Tuma <martin.tuma@...iteqautomotive.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: opensource.kernel@...o.com,
	Yang Ruibin <11162571@...o.com>
Subject: [PATCH v1] drivers:mgb4:Fix the NULL vs IS_ERR() bug for debugfs_create_dir()

The debugfs_create_dir() function returns error pointers.
It never returns NULL. So use IS_ERR() to check it.

Signed-off-by: Yang Ruibin <11162571@...o.com>
---
 drivers/media/pci/mgb4/mgb4_vout.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/pci/mgb4/mgb4_vout.c b/drivers/media/pci/mgb4/mgb4_vout.c
index 998edcbd9723..348c8e01fcbe 100644
--- a/drivers/media/pci/mgb4/mgb4_vout.c
+++ b/drivers/media/pci/mgb4/mgb4_vout.c
@@ -683,7 +683,7 @@ static void debugfs_init(struct mgb4_vout_dev *voutdev)
 
 	voutdev->debugfs = debugfs_create_dir(voutdev->vdev.name,
 					      voutdev->mgbdev->debugfs);
-	if (!voutdev->debugfs)
+	if (IS_ERR(voutdev->debugfs))
 		return;
 
 	voutdev->regs[0].name = "CONFIG";
-- 
2.34.1