linux-kernel - [PATCH 4.19 079/148] media: em28xx: annotate unchecked call to media_device

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Message-ID: <20240324235012.1356413-80-sashal@kernel.org>
Date: Sun, 24 Mar 2024 19:49:03 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Nikita Zhandarovich <n.zhandarovich@...tech.ru>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Hans Verkuil <hverkuil-cisco@...all.nl>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 079/148] media: em28xx: annotate unchecked call to media_device_register()

From: Nikita Zhandarovich <n.zhandarovich@...tech.ru>

[ Upstream commit fd61d77a3d28444b2635f0c8b5a2ecd6a4d94026 ]

Static analyzers generate alerts for an unchecked call to
`media_device_register()`. However, in this case, the device will work
reliably without the media controller API.

Add a comment above the call to prevent future unnecessary changes.

Suggested-by: Mauro Carvalho Chehab <mchehab@...nel.org>
Fixes: 37ecc7b1278f ("[media] em28xx: add media controller support")
Signed-off-by: Nikita Zhandarovich <n.zhandarovich@...tech.ru>
Signed-off-by: Hans Verkuil <hverkuil-cisco@...all.nl>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/media/usb/em28xx/em28xx-cards.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/media/usb/em28xx/em28xx-cards.c b/drivers/media/usb/em28xx/em28xx-cards.c
index b14bff7b4ec88..b9874324d1c44 100644
--- a/drivers/media/usb/em28xx/em28xx-cards.c
+++ b/drivers/media/usb/em28xx/em28xx-cards.c
@@ -3990,6 +3990,10 @@ static int em28xx_usb_probe(struct usb_interface *intf,
 	 * topology will likely change after the load of the em28xx subdrivers.
 	 */
 #ifdef CONFIG_MEDIA_CONTROLLER
+	/*
+	 * No need to check the return value, the device will still be
+	 * usable without media controller API.
+	 */
 	retval = media_device_register(dev->media_dev);
 #endif
 
-- 
2.43.0