Re: [PATCH 1/2] drivers: base: component: add function to query the bound status

Greg KH
2025-02-21T06:19:53Z

On Fri, Feb 21, 2025 at 12:41:40AM +0100, Heiko Stuebner wrote:
> The component helpers already expose the bound status in debugfs, but at
> times it might be necessary to also check that state in the kernel and
> act differently depending on the result.
>
> For example the shutdown handler of a drm-driver might need to stop
> a whole output pipeline if the drm device is up and running, but may
> run into problems if that drm-device has never been set up before,
> for example because the binding deferred.
>
> So add a little helper that returns the bound status for a componet
> device.
>
> Signed-off-by: Heiko Stuebner <heiko@sntech.de>
> ---
> drivers/base/component.c | 14 ++++++++++++++
> include/linux/component.h | 4 +++-
> 2 files changed, 17 insertions(+), 1 deletion(-)

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>