On Monday 12 March 2012 14:39:02 Bhupesh Sharma wrote:
> As the V4L2 based UVC webcam gadget (g_webcam) expects the
> 'videodev' to present when the 'webcam_bind' routine is called,
> so 'videodev' should be available as early as possible.
>
> Now, when 'g_webcam' is built as a module (i.e. not a part of
> kernel) the late availability of 'videodev' is OK, but if
> 'g_webcam' is built statically as a part of the kernel,
> the kernel crashes (a sample crash dump using Designware 2.0 UDC
> is provided below).
>
> To solve the same, this patch makes 'videodev_init' as a subsys initcall.
[snip]
> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@xxxxxx>
Tested-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> ---
> drivers/media/video/v4l2-dev.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c
> index 96e9615..041804b 100644
> --- a/drivers/media/video/v4l2-dev.c
> +++ b/drivers/media/video/v4l2-dev.c
> @@ -788,7 +788,7 @@ static void __exit videodev_exit(void)
> unregister_chrdev_region(dev, VIDEO_NUM_DEVICES);
> }
>
> -module_init(videodev_init)
> +subsys_initcall(videodev_init);
> module_exit(videodev_exit)
>
> MODULE_AUTHOR("Alan Cox, Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxx>");
--
Regards,
Laurent Pinchart
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