On Thu, Nov 12, 2015 at 04:09:56PM +0900, Alexandre Courbot wrote:
> drm_gem_object_unreference() now expects obj->dev->struct_mutex to be
> held. Use the newly-introduced drm_gem_object_unreference_unlocked()
> which handles locking for us.
This rule has been really old, I simply made the checking more anal in
commit ef4c6270bf2867e2f8032e9614d1a8cfc6c71663
Author: Daniel Vetter <daniel.vetter@xxxxxxxx>
Date: Thu Oct 15 09:36:25 2015 +0200
drm/gem: Check locking in drm_gem_object_unreference
With the above added this is:
Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
>
> If we don't do this drm_gem_object_unreference() will get noisy about
> struct_mutex not being held every time we call the SET_TILING ioctl.
>
> Signed-off-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
> ---
> drivers/gpu/drm/tegra/drm.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
> index cc48334ef164..c0ae89865958 100644
> --- a/drivers/gpu/drm/tegra/drm.c
> +++ b/drivers/gpu/drm/tegra/drm.c
> @@ -683,7 +683,7 @@ static int tegra_gem_set_tiling(struct drm_device *drm, void *data,
> bo->tiling.mode = mode;
> bo->tiling.value = value;
>
> - drm_gem_object_unreference(gem);
> + drm_gem_object_unreference_unlocked(gem);
>
> return 0;
> }
> --
> 2.6.2
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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