linux-kernel - Re: [PATCH] drm/rockchip: fix dma_alloc

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Date:	Wed, 21 Jan 2015 10:43:07 +0800
From:	Daniel Kurtz <djkurtz@...omium.org>
To:	Mark Yao <mark.yao@...k-chips.com>, David Airlie <airlied@...ux.ie>
Cc:	Pawel Osciak <posciak@...omium.org>,
	"open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
	Daniel Kurtz <djkurtz@...omium.org>,
	Daniel Vetter <daniel@...ll.ch>,
	Rob Clark <robdclark@...il.com>,
	"open list:DRM DRIVERS" <dri-devel@...ts.freedesktop.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/rockchip: fix dma_alloc_attrs() error check

Mark: did you get a chance to fixup the "Reported-by" line?  It's not
a bit deal if you didn't.

Dave: did you pick up this pull request?  Did Mark request properly?

On Fri, Jan 9, 2015 at 12:01 PM, Daniel Kurtz <djkurtz@...omium.org> wrote:
> On Wed, Jan 7, 2015 at 5:27 PM, Daniel Kurtz <djkurtz@...omium.org> wrote:
>> dma_alloc_attrs() returns NULL if it cannot allocate a dma buffer (or
>> mapping), not a negative error code.
>>
>> Rerported-by: Pawel Osciak <posciak@...omium.org>
>
> Oops!  I just noticed that this is spelled wrong.  Should be "Reported-by".
>
> Mark, could you fix up on your tree, or is it too late?
>
>> Signed-off-by: Daniel Kurtz <djkurtz@...omium.org>
>> ---
>>  drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 9 +++------
>>  1 file changed, 3 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
>> index bc98a22..7ca8799e 100644
>> --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
>> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
>> @@ -34,12 +34,9 @@ static int rockchip_gem_alloc_buf(struct rockchip_gem_object *rk_obj)
>>         rk_obj->kvaddr = dma_alloc_attrs(drm->dev, obj->size,
>>                                          &rk_obj->dma_addr, GFP_KERNEL,
>>                                          &rk_obj->dma_attrs);
>> -       if (IS_ERR(rk_obj->kvaddr)) {
>> -               int ret = PTR_ERR(rk_obj->kvaddr);
>> -
>> -               DRM_ERROR("failed to allocate %#x byte dma buffer, %d",
>> -                         obj->size, ret);
>> -               return ret;
>> +       if (!rk_obj->kvaddr) {
>> +               DRM_ERROR("failed to allocate %#x byte dma buffer", obj->size);
>> +               return -ENOMEM;
>>         }
>>
>>         return 0;
>> --
>> 2.2.0.rc0.207.ga3a616c
>>
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