linux-kernel - [PATCH] media: em28xx: annotate unchecked call to media_device

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Message-ID: <20240112134226.10618-1-n.zhandarovich@fintech.ru>
Date: Fri, 12 Jan 2024 05:42:26 -0800
From: Nikita Zhandarovich <n.zhandarovich@...tech.ru>
To: Mauro Carvalho Chehab <mchehab@...nel.org>
CC: Nikita Zhandarovich <n.zhandarovich@...tech.ru>,
	<linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] media: em28xx: annotate unchecked call to media_device_register()

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>
---
Link to disussion about comment's necessity:
https://lore.kernel.org/all/20240111184035.18a6ad4b@coco.lan/

 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 4d037c92af7c..bae76023cf71 100644
--- a/drivers/media/usb/em28xx/em28xx-cards.c
+++ b/drivers/media/usb/em28xx/em28xx-cards.c
@@ -4094,6 +4094,10 @@ 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