linux-kernel - Re: [PATCH] drm/amdkfd: fix typing in (*hqd

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Date:   Tue, 24 Apr 2018 15:09:45 -0400
From:   Felix Kuehling <felix.kuehling@....com>
To:     Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        linux-kernel@...r.kernel.org
Cc:     Oded Gabbay <oded.gabbay@...il.com>,
        "David (ChunMing) Zhou" <David1.Zhou@....com>,
        David Airlie <airlied@...ux.ie>,
        dri-devel@...ts.freedesktop.org, amd-gfx@...ts.freedesktop.org,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>
Subject: Re: [PATCH] drm/amdkfd: fix typing in (*hqd_destroy)


On 2018-04-24 09:14 AM, Luc Van Oostenryck wrote:
> The method (*hqd_destroy) is defined as using an 'uint32_t'
> as 3rd argument but the the actual implementation of this
> method and all its calls actually uses an 'enum kfd_preempt_type'
> for this argument.
>
> Fix this by using 'enum kfd_preempt_type' for (*hqd_destroy) too.
>
> Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@...il.com>

Interesting. I'm surprised I never saw a compiler warning about a
function pointer type mismatch. I guess C isn't picky about integer
types as long as the size is the same.

Anyway, this patch is Reviewed-by: Felix Kuehling <Felix.Kuehling@....com>

> ---
>  drivers/gpu/drm/amd/include/kgd_kfd_interface.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h
> index 237289a72..2890e8581 100644
> --- a/drivers/gpu/drm/amd/include/kgd_kfd_interface.h
> +++ b/drivers/gpu/drm/amd/include/kgd_kfd_interface.h
> @@ -298,7 +298,7 @@ struct kfd2kgd_calls {
>  	bool (*hqd_is_occupied)(struct kgd_dev *kgd, uint64_t queue_address,
>  				uint32_t pipe_id, uint32_t queue_id);
>  
> -	int (*hqd_destroy)(struct kgd_dev *kgd, void *mqd, uint32_t reset_type,
> +	int (*hqd_destroy)(struct kgd_dev *kgd, void *mqd, enum kfd_preempt_type reset_type,
>  				unsigned int timeout, uint32_t pipe_id,
>  				uint32_t queue_id);
>