Quoting Laurent Pinchart (2025-06-18 03:01:49)
> A few functions have documented locking conventions. Documentation is
> nice, but runtime checks are better. Enforce the conventions with
> lockdep assertions.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
I always like extra checks, so this sounds good.
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
> ---
> drivers/media/platform/renesas/vsp1/vsp1_dl.c | 5 +++++
> drivers/media/platform/renesas/vsp1/vsp1_pipe.c | 3 +++
> 2 files changed, 8 insertions(+)
>
> diff --git a/drivers/media/platform/renesas/vsp1/vsp1_dl.c b/drivers/media/platform/renesas/vsp1/vsp1_dl.c
> index c660f8539ff5..d732b4ed1180 100644
> --- a/drivers/media/platform/renesas/vsp1/vsp1_dl.c
> +++ b/drivers/media/platform/renesas/vsp1/vsp1_dl.c
> @@ -10,6 +10,7 @@
> #include <linux/device.h>
> #include <linux/dma-mapping.h>
> #include <linux/gfp.h>
> +#include <linux/lockdep.h>
> #include <linux/refcount.h>
> #include <linux/slab.h>
> #include <linux/workqueue.h>
> @@ -612,6 +613,8 @@ struct vsp1_dl_list *vsp1_dl_list_get(struct vsp1_dl_manager *dlm)
> struct vsp1_dl_list *dl = NULL;
> unsigned long flags;
>
> + lockdep_assert_not_held(&dlm->lock);
> +
> spin_lock_irqsave(&dlm->lock, flags);
>
> if (!list_empty(&dlm->free)) {
> @@ -639,6 +642,8 @@ static void __vsp1_dl_list_put(struct vsp1_dl_list *dl)
> if (!dl)
> return;
>
> + lockdep_assert_held(&dl->dlm->lock);
> +
> /*
> * Release any linked display-lists which were chained for a single
> * hardware operation.
> diff --git a/drivers/media/platform/renesas/vsp1/vsp1_pipe.c b/drivers/media/platform/renesas/vsp1/vsp1_pipe.c
> index 3cbb768cf6ad..5d769cc42fe1 100644
> --- a/drivers/media/platform/renesas/vsp1/vsp1_pipe.c
> +++ b/drivers/media/platform/renesas/vsp1/vsp1_pipe.c
> @@ -9,6 +9,7 @@
>
> #include <linux/delay.h>
> #include <linux/list.h>
> +#include <linux/lockdep.h>
> #include <linux/sched.h>
> #include <linux/wait.h>
>
> @@ -473,6 +474,8 @@ void vsp1_pipeline_run(struct vsp1_pipeline *pipe)
> {
> struct vsp1_device *vsp1 = pipe->output->entity.vsp1;
>
> + lockdep_assert_held(&pipe->irqlock);
> +
> if (pipe->state == VSP1_PIPELINE_STOPPED) {
> vsp1_write(vsp1, VI6_CMD(pipe->output->entity.index),
> VI6_CMD_STRCMD);
>
> base-commit: d20469375306163719ee458dd83b7d6c1c93d4d1
> --
> Regards,
>
> Laurent Pinchart
>
