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Subject: Re: [PATCH v3] drm/fence: allow fence waiting to be interrupted by
 userspace
To: Gustavo Padovan <gustavo@padovan.org>, dri-devel@lists.freedesktop.org
References: <1472143678-1277-1-git-send-email-gustavo@padovan.org>
Cc: linux-kernel@vger.kernel.org, Daniel Stone <daniels@collabora.com>,
        Daniel Vetter <daniel.vetter@ffwll.ch>,
        Rob Clark <robdclark@gmail.com>, Greg Hackmann <ghackmann@google.com>,
        John Harrison <John.C.Harrison@Intel.com>,
        laurent.pinchart@ideasonboard.com, seanpaul@google.com,
        marcheu@google.com, m.chehab@samsung.com,
        Sumit Semwal <sumit.semwal@linaro.org>,
        Gustavo Padovan <gustavo.padovan@collabora.co.uk>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Message-ID: <00eca2cc-3a1b-19a4-8376-cd95851f892c@linux.intel.com>
Date: Mon, 12 Sep 2016 15:32:19 +0200
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Op 25-08-16 om 18:47 schreef Gustavo Padovan:
> From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
>
> If userspace is running an synchronously atomic commit and interrupts the
> atomic operation during fence_wait() it will hang until the timer expires,
> so here we change the wait to be interruptible so it stop immediately when
> userspace wants to quit.
>
> Also adds the necessary error checking for fence_wait().
>
> v2: Comment by Daniel Vetter
> 	- Add error checking for fence_wait()
>
> v3: Rebase on top of new atomic noblocking support
>
> v4: Comment by Maarten Lankhorst
> 	- remove 'swapped' bitfield as it was duplicating information
>
> v5: Comments by Maarten Lankhorst
> 	- assign plane->state to plane_state if !intr
> 	- squash previous patch into this one
>
> Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>