Re: [PATCH 2/2] [media] Input: synaptics-rmi4: disallow impossible configuration
From: Nick Dyer <nick@shmanahar.org>
Date: 2016-09-15 20:31:22
Also in:
linux-media, lkml
On Mon, Sep 12, 2016 at 05:30:33PM +0200, Arnd Bergmann wrote:
The newly added debug mode for the synaptics-rmi4 driver relies on
the v4l2 interface and vb2_vmalloc, but those might be configured
as loadable modules when the driver itself is built-in, resulting
in a link failure:
drivers/input/rmi4/rmi_core.o: In function `rmi_f54_remove':
rmi_f54.c:(.text.rmi_f54_remove+0x14): undefined reference to `video_unregister_device'
rmi_f54.c:(.text.rmi_f54_remove+0x20): undefined reference to `v4l2_device_unregister'
drivers/input/rmi4/rmi_core.o: In function `rmi_f54_vidioc_s_input':
rmi_f54.c:(.text.rmi_f54_vidioc_s_input+0x10): undefined reference to `video_devdata'
drivers/input/rmi4/rmi_core.o: In function `rmi_f54_vidioc_g_input':
rmi_f54.c:(.text.rmi_f54_vidioc_g_input+0x10): undefined reference to `video_devdata'
drivers/input/rmi4/rmi_core.o: In function `rmi_f54_vidioc_fmt':
rmi_f54.c:(.text.rmi_f54_vidioc_fmt+0x10): undefined reference to `video_devdata'
drivers/input/rmi4/rmi_core.o: In function `rmi_f54_vidioc_enum_input':
rmi_f54.c:(.text.rmi_f54_vidioc_enum_input+0x10): undefined reference to `video_devdata'
drivers/input/rmi4/rmi_core.o: In function `rmi_f54_vidioc_querycap':
...
The best workaround I could come up with is to disallow the debug
mode unless it's actually possible to call it.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 3a762dbd5347 ("[media] Input: synaptics-rmi4 - add support for F54 diagnostics")Acked-by: Nick Dyer <nick@shmanahar.org>
quoted hunk ↗ jump to hunk
--- drivers/input/rmi4/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)diff --git a/drivers/input/rmi4/Kconfig b/drivers/input/rmi4/Kconfig index f3418b65eb41..4c8a55857e00 100644 --- a/drivers/input/rmi4/Kconfig +++ b/drivers/input/rmi4/Kconfig@@ -65,7 +65,7 @@ config RMI4_F30 config RMI4_F54 bool "RMI4 Function 54 (Analog diagnostics)" depends on RMI4_CORE - depends on VIDEO_V4L2 + depends on VIDEO_V4L2=y || (RMI4_CORE=m && VIDEO_V4L2=m) select VIDEOBUF2_VMALLOC help Say Y here if you want to add support for RMI4 function 54-- 2.9.0