linux-kernel - Re: [PATCH] drm/nouveau: avoid memory leak

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Date:	Wed, 18 Jun 2014 19:24:30 -0400 (EDT)
From:	Ben Skeggs <bskeggs@...hat.com>
To:	Heinrich Schuchardt <xypron.glpk@....de>
Cc:	David Airlie <airlied@...ux.ie>, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/nouveau: avoid memory leak

----- Original Message -----
> From: "Heinrich Schuchardt" <xypron.glpk@....de>
> To: "David Airlie" <airlied@...ux.ie>
> Cc: "Ben Skeggs" <bskeggs@...hat.com>, dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, "Heinrich
> Schuchardt" <xypron.glpk@....de>
> Sent: Thursday, 19 June, 2014 5:57:47 AM
> Subject: [PATCH] drm/nouveau: avoid memory leak
> 
> If ttm_dma_tt_init fails memory is leaked.
No, it's not.  TTM calls the destroy function itself on failure.

Thanks,
Ben.
> 
> Signed-off-by: Heinrich Schuchardt <xypron.glpk@....de>
> ---
>  drivers/gpu/drm/nouveau/nouveau_sgdma.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/nouveau_sgdma.c
> b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
> index a4d22e5..23d880b 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_sgdma.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
> @@ -109,7 +109,9 @@ nouveau_sgdma_create_ttm(struct ttm_bo_device *bdev,
>  	else
>  		nvbe->ttm.ttm.func = &nv50_sgdma_backend;
>  
> -	if (ttm_dma_tt_init(&nvbe->ttm, bdev, size, page_flags, dummy_read_page))
> +	if (ttm_dma_tt_init(&nvbe->ttm, bdev, size, page_flags, dummy_read_page)) {
> +		kfree(nvbe);
>  		return NULL;
> +	}
>  	return &nvbe->ttm.ttm;
>  }
> --
> 2.0.0
> 
> 
--
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