2015년 11월 17일 01:23에 Daniel Vetter 이(가) 쓴 글:
> On Mon, Nov 16, 2015 at 05:22:42PM +0100, Daniel Vetter wrote:
>> On Tue, Jul 28, 2015 at 05:53:23PM +0900, Joonyoung Shim wrote:
>>> Don't create a fake mmap offset in exynos_drm_gem_dumb_map_offset. If
>>> not, it will call drm_gem_create_mmap_offset whenever user requests
>>> DRM_IOCTL_MODE_MAP_DUMB ioctl.
>>>
>>> Signed-off-by: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
>>> ---
>>> drivers/gpu/drm/exynos/exynos_drm_gem.c | 12 +++++++-----
>>> 1 file changed, 7 insertions(+), 5 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
>>> index 550d267..c76aa8a 100644
>>> --- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
>>> +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
>>> @@ -151,6 +151,13 @@ struct exynos_drm_gem_obj *exynos_drm_gem_init(struct drm_device *dev,
>>> return ERR_PTR(ret);
>>> }
>>>
>>> + ret = drm_gem_create_mmap_offset(obj);
>>> + if (ret < 0) {
>>> + drm_gem_object_release(obj);
>>> + kfree(exynos_gem_obj);
>>> + return ERR_PTR(ret);
>>> + }
>>> +
>>> DRM_DEBUG_KMS("created file object = 0x%x\n", (unsigned int)obj->filp);
>>>
>>> return exynos_gem_obj;
>>> @@ -521,14 +528,9 @@ int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv,
>>> goto unlock;
>>> }
>>>
>>> - ret = drm_gem_create_mmap_offset(obj);
>>
>> drm_gem_create_mmap_offset internally checks whether it's been already
>> (protected by locks), so this code is perfectly fine. I don't see any
>> justification for this change (but only noticed it because rockchip
>> cargo-culted this change).
>
> I think it'd be good to revert this to stay consistent with cma helpers
> and other drivers.
At least, seems cma halper doesn't also call drm_gem_create_mmap_offset function
at drm_gem_cma_dumb_map_offset function and calls it at cma creation instead.
So I think now Exynos drm keeps consistent with cma helper.
Thanks,
Inki Dae
> -Daniel
>
>> -Daniel
>>
>>> - if (ret)
>>> - goto out;
>>> -
>>> *offset = drm_vma_node_offset_addr(&obj->vma_node);
>>> DRM_DEBUG_KMS("offset = 0x%lx\n", (unsigned long)*offset);
>>>
>>> -out:
>>> drm_gem_object_unreference(obj);
>>> unlock:
>>> mutex_unlock(&dev->struct_mutex);
>>> --
>>> 1.9.1
>>>
>>> _______________________________________________
>>> dri-devel mailing list
>>> dri-devel@xxxxxxxxxxxxxxxxxxxxx
>>> http://lists.freedesktop.org/mailman/listinfo/dri-devel
>>
>> --
>> Daniel Vetter
>> Software Engineer, Intel Corporation
>> http://blog.ffwll.ch
>
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