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From:   Arnd Bergmann <arnd@kernel.org>
To:     Mauro Carvalho Chehab <mchehab@kernel.org>
Cc:     niklas.soderlund+renesas@ragnatech.se, geert+renesas@glider.be,
        prabhakar.mahadev-lad.rj@bp.renesas.com,
        Arnd Bergmann <arnd@arndb.de>,
        Hans Verkuil <hverkuil-cisco@xs4all.nl>,
        Alexandre Courbot <acourbot@chromium.org>,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        linux-media@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] media: rcar_drif: select CONFIG_V4L2_ASYNC
Date:   Wed, 21 Jul 2021 17:24:59 +0200
Message-Id: <20210721152522.2928952-1-arnd@kernel.org>
MIME-Version: 1.0
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From: Arnd Bergmann <arnd@arndb.de>

Without this, I see a randconfig link failure:

aarch64-linux-ld: drivers/media/platform/rcar_drif.o: in function `rcar_drif_remove':
rcar_drif.c:(.text+0x2a8): undefined reference to `v4l2_async_notifier_unregister'
aarch64-linux-ld: rcar_drif.c:(.text+0x2b0): undefined reference to `v4l2_async_notifier_cleanup'
aarch64-linux-ld: drivers/media/platform/rcar_drif.o: in function `rcar_drif_sdr_probe':
rcar_drif.c:(.text+0x1444): undefined reference to `v4l2_async_notifier_init'
aarch64-linux-ld: rcar_drif.c:(.text+0x14a0): undefined reference to `v4l2_async_notifier_register'
aarch64-linux-ld: rcar_drif.c:(.text+0x14d8): undefined reference to `v4l2_async_notifier_cleanup'
aarch64-linux-ld: rcar_drif.c:(.text+0x15a8): undefined reference to `__v4l2_async_notifier_add_fwnode_subdev'

I could not easily figure out when this was introduced, as this code
has not changed in a while but I only saw the problem recently.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 drivers/media/platform/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
index 157c924686e4..c5d1c83bd582 100644
--- a/drivers/media/platform/Kconfig
+++ b/drivers/media/platform/Kconfig
@@ -635,6 +635,7 @@ config VIDEO_RCAR_DRIF
 	depends on VIDEO_V4L2
 	depends on ARCH_RENESAS || COMPILE_TEST
 	select VIDEOBUF2_VMALLOC
+	select V4L2_ASYNC
 	help
 	  Say Y if you want to enable R-Car Gen3 DRIF support. DRIF is Digital
 	  Radio Interface that interfaces with an RF front end chip. It is a
-- 
2.29.2