Hi Sakari,
Thank you for the patch.
On Mon, Oct 23, 2023 at 03:33:03PM +0300, Sakari Ailus wrote:
> There are two sets of functions that return information from sub-device
> state, one for stream-unaware users and another for stream-aware users.
> Add support for stream-aware functions to return format, crop and compose
> information from pad-based array that are functionally equivalent to the
> old, stream-unaware ones.
>
> Also check state is non-NULL, in order to guard against old drivers
> potentially calling this with NULL state for active formats or selection
> rectangles.
>
> Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
> ---
> drivers/media/v4l2-core/v4l2-subdev.c | 39 +++++++++++++++++++++++++++
> 1 file changed, 39 insertions(+)
>
> diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
> index ee4fe8f33a41..955ee9a6c91f 100644
> --- a/drivers/media/v4l2-core/v4l2-subdev.c
> +++ b/drivers/media/v4l2-core/v4l2-subdev.c
> @@ -1684,6 +1684,19 @@ v4l2_subdev_state_get_stream_format(struct v4l2_subdev_state *state,
> struct v4l2_subdev_stream_configs *stream_configs;
> unsigned int i;
>
> + if (WARN_ON(!state))
> + return NULL;
> +
> + if (state->pads) {
> + if (stream)
> + return NULL;
> +
> + if (WARN_ON(pad >= state->sd->entity.num_pads))
> + pad = 0;
> +
> + return &state->pads[pad].try_fmt;
> + }
> +
> lockdep_assert_held(state->lock);
Can we move towards proper locking for all callers ?
>
> stream_configs = &state->stream_configs;
> @@ -1705,6 +1718,19 @@ v4l2_subdev_state_get_stream_crop(struct v4l2_subdev_state *state,
> struct v4l2_subdev_stream_configs *stream_configs;
> unsigned int i;
>
> + if (WARN_ON(!state))
> + return NULL;
> +
> + if (state->pads) {
> + if (stream)
> + return NULL;
> +
> + if (WARN_ON(pad >= state->sd->entity.num_pads))
> + pad = 0;
> +
> + return &state->pads[pad].try_crop;
> + }
> +
> lockdep_assert_held(state->lock);
>
> stream_configs = &state->stream_configs;
> @@ -1726,6 +1752,19 @@ v4l2_subdev_state_get_stream_compose(struct v4l2_subdev_state *state,
> struct v4l2_subdev_stream_configs *stream_configs;
> unsigned int i;
>
> + if (WARN_ON(!state))
> + return NULL;
> +
> + if (state->pads) {
> + if (stream)
> + return NULL;
> +
> + if (WARN_ON(pad >= state->sd->entity.num_pads))
> + pad = 0;
> +
> + return &state->pads[pad].try_compose;
> + }
> +
> lockdep_assert_held(state->lock);
>
> stream_configs = &state->stream_configs;
> --
> 2.39.2
>
--
Regards,
Laurent Pinchart
