linux-kernel - Re: [PATCH v4 03/13] drm/amdgpu: fix error handling in amdgpu_copy

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Message-ID: <95448a54-d471-4c6d-a940-0fa590d358a9@amd.com>
Date: Tue, 2 Dec 2025 12:43:04 +0100
From: Christian König <christian.koenig@....com>
To: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>,
 Alex Deucher <alexander.deucher@....com>, David Airlie <airlied@...il.com>,
 Simona Vetter <simona@...ll.ch>
Cc: amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 03/13] drm/amdgpu: fix error handling in
 amdgpu_copy_buffer

On 12/2/25 10:47, Pierre-Eric Pelloux-Prayer wrote:
> drm_sched_job_add_resv_dependencies can fail in amdgpu_ttm_prepare_job.
> In this case we need to use amdgpu_job_free to release memory.
> 
> ---
> v4: moved job pointer clearing to a different patchset
> ---
> 
> Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>

Reviewed-by: Christian König <christian.koenig@....com>

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index ae3ad19667df..6e8b6fd94378 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -2278,7 +2278,7 @@ int amdgpu_copy_buffer(struct amdgpu_device *adev, uint64_t src_offset,
>  				   resv, vm_needs_flush, &job, false,
>  				   AMDGPU_KERNEL_JOB_ID_TTM_COPY_BUFFER);
>  	if (r)
> -		return r;
> +		goto error_free;
>  
>  	for (i = 0; i < num_loops; i++) {
>  		uint32_t cur_size_in_bytes = min(byte_count, max_bytes);
> @@ -2290,11 +2290,9 @@ int amdgpu_copy_buffer(struct amdgpu_device *adev, uint64_t src_offset,
>  		byte_count -= cur_size_in_bytes;
>  	}
>  
> -	if (r)
> -		goto error_free;
>  	*fence = amdgpu_ttm_job_submit(adev, job, num_dw);
>  
> -	return r;
> +	return 0;
>  
>  error_free:
>  	amdgpu_job_free(job);