On Mon, Mar 25, 2013 at 10:22:37AM +0100, Maarten Lankhorst wrote:
> Fixes 100% cpu usage when the exit interrupt never got acked.
>
> Signed-off-by: Maarten Lankhorst <m.b.lankhorst@xxxxxxxxx>
> ---
> diff --git a/drivers/gpu/drm/nouveau/core/core/falcon.c b/drivers/gpu/drm/nouveau/core/core/falcon.c
> index e05c157..b11c5f3 100644
> --- a/drivers/gpu/drm/nouveau/core/core/falcon.c
> +++ b/drivers/gpu/drm/nouveau/core/core/falcon.c
> @@ -229,6 +229,24 @@ _nouveau_falcon_fini(struct nouveau_object *object, bool suspend)
> return nouveau_engine_fini(&falcon->base, suspend);
> }
>
> +void
> +nouveau_falcon_intr(struct nouveau_subdev *subdev)
> +{
> + struct nouveau_falcon *falcon = (void*)subdev;
> + u32 intr = nv_ro32(falcon, 0x008);
> +
> + nv_wo32(falcon, 0x004, intr);
> +
> + if (intr & 0x10) {
> + intr &= ~0x10;
> +
> + nv_info(falcon, "Exit interrupt called\n");
Do you really want to print it at "info" level? How frequent it is?
> + }
> +
> + if (intr)
> + nv_error(falcon, "Unhandled interrupt %08x\n", intr);
> +}
> +
> int
> nouveau_falcon_create_(struct nouveau_object *parent,
> struct nouveau_object *engine,
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