linux-kernel - Re: [PATCH 1/1] drm/radeon: check return vlaue of radeon_fence

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Date:   Mon, 24 Apr 2017 09:49:21 +0200
From:   Christian König <deathsimple@...afone.de>
To:     Pan Bian <bianpan201603@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        David Airlie <airlied@...ux.ie>
Cc:     Pan Bian <bianpan2016@....com>, dri-devel@...ts.freedesktop.org,
        amd-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] drm/radeon: check return vlaue of radeon_fence_emit

Am 23.04.2017 um 15:50 schrieb Pan Bian:
> From: Pan Bian <bianpan2016@....com>
>
> Function radeon_fence_emit() returns -ENOMEM if there is no enough
> memory. And in this case, function radeon_ring_unlock_undo() rather than
> function radeon_ring_unlock_commit() should be called. However, in
> function radeon_test_create_and_emit_fence(), the return value of
> radeon_fence_emit() is ignored. This patch adds the check.
>
> Signed-off-by: Pan Bian <bianpan2016@....com>
> ---
>   drivers/gpu/drm/radeon/radeon_test.c | 6 +++++-
>   1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon_test.c b/drivers/gpu/drm/radeon/radeon_test.c
> index 79181816..7a44703 100644
> --- a/drivers/gpu/drm/radeon/radeon_test.c
> +++ b/drivers/gpu/drm/radeon/radeon_test.c
> @@ -298,7 +298,11 @@ static int radeon_test_create_and_emit_fence(struct radeon_device *rdev,
>   			DRM_ERROR("Failed to lock ring A %d\n", ring->idx);
>   			return r;
>   		}
> -		radeon_fence_emit(rdev, fence, ring->idx);
> +		r = radeon_fence_emit(rdev, fence, ring->idx);
> +		if (r) {
> +			radeon_ring_unlock_undo(rdev, ring);

Please add a DRM_ERROR() here as well.

Apart from that it looks good to me.

Christian.

> +			return r;
> +		}
>   		radeon_ring_unlock_commit(rdev, ring, false);
>   	}
>   	return 0;