linux-kernel - [PATCH] [media] platform: video-mux: fix Kconfig dependency

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Date:   Mon, 10 Jul 2017 10:48:43 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Russell King <linux@...linux.org.uk>,
        Steve Longerbeam <steve_longerbeam@...tor.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Pavel Machek <pavel@....cz>,
        Hans Verkuil <hans.verkuil@...co.com>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] [media] platform: video-mux: fix Kconfig dependency

When CONFIG_V4L2 is built as a loadable module, the new video mux driver
fails to link as built-in code:

drivers/media/platform/video-mux.o: In function `video_mux_remove':
video-mux.c:(.text+0x24): undefined reference to `v4l2_async_unregister_subdev'
drivers/media/platform/video-mux.o: In function `video_mux_probe':
video-mux.c:(.text+0x800): undefined reference to `v4l2_subdev_init'
video-mux.c:(.text+0xa10): undefined reference to `v4l2_async_register_subdev'

This makes it use the same Kconfig dependency as all the other users of
the VIDEO_V4L2_SUBDEV_API symbol.

Fixes: 68803ad4522f ("[media] platform: add video-multiplexer subdevice driver")
Cc: Sascha Hauer <s.hauer@...gutronix.de>
Cc: Philipp Zabel <p.zabel@...gutronix.de>
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
Cc: Russell King <linux@...linux.org.uk>
Cc: Steve Longerbeam <steve_longerbeam@...tor.com>
Cc: Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc: Pavel Machek <pavel@....cz>
---
 drivers/media/platform/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
index fb1fa0b82077..20179eb8f31e 100644
--- a/drivers/media/platform/Kconfig
+++ b/drivers/media/platform/Kconfig
@@ -76,7 +76,7 @@ config VIDEO_M32R_AR_M64278
 
 config VIDEO_MUX
 	tristate "Video Multiplexer"
-	depends on OF && VIDEO_V4L2_SUBDEV_API && MEDIA_CONTROLLER
+	depends on VIDEO_V4L2 && OF && VIDEO_V4L2_SUBDEV_API && MEDIA_CONTROLLER
 	select REGMAP
 	help
 	  This driver provides support for N:1 video bus multiplexers.
-- 
2.9.0