From 570a82b9c36f76a5959b5e47900629b0d413931d Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 20 Sep 2021 10:58:24 +0100 Subject: [PATCH] media: i2c: select V4L2_ASYNC where needed I came across a link failure from randconfig builds: x86_64-linux-ld: drivers/media/i2c/ths8200.o: in function `ths8200_remove': ths8200.c:(.text+0x491): undefined reference to `v4l2_async_unregister_subdev' x86_64-linux-ld: drivers/media/i2c/ths8200.o: in function `ths8200_probe': ths8200.c:(.text+0xe49): undefined reference to `v4l2_async_register_subdev' x86_64-linux-ld: drivers/media/i2c/tw9910.o: in function `tw9910_remove': tw9910.c:(.text+0x467): undefined reference to `v4l2_async_unregister_subdev' x86_64-linux-ld: drivers/media/i2c/tw9910.o: in function `tw9910_probe': tw9910.c:(.text+0x1123): undefined reference to `v4l2_async_register_subdev' These clearly lack a 'select' statement, but I don't know why this started happening only now. I had a bit of a look around to find other configs that have the same problem, but could not come up with a reliable way and found nothing else through experimentation. It is likely that other symbols like these exist that need an extra select. Signed-off-by: Arnd Bergmann Acked-by: Sakari Ailus Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/Kconfig | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 0e56489..d6a5d4ca 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -450,6 +450,7 @@ config VIDEO_TW9906 config VIDEO_TW9910 tristate "Techwell TW9910 video decoder" depends on VIDEO_V4L2 && I2C + select V4L2_ASYNC help Support for Techwell TW9910 NTSC/PAL/SECAM video decoder. @@ -611,6 +612,7 @@ menu "Video improvement chips" config VIDEO_UPD64031A tristate "NEC Electronics uPD64031A Ghost Reduction" depends on VIDEO_V4L2 && I2C + select V4L2_ASYNC help Support for the NEC Electronics uPD64031A Ghost Reduction video chip. It is most often found in NTSC TV cards made for -- 2.7.4