linux-kernel - Re: [PATCH v3] drm/fence: allow fence waiting to be interrupted by userspace

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Message-ID: <00eca2cc-3a1b-19a4-8376-cd95851f892c@linux.intel.com>
Date:   Mon, 12 Sep 2016 15:32:19 +0200
From:   Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
To:     Gustavo Padovan <gustavo@...ovan.org>,
        dri-devel@...ts.freedesktop.org
Cc:     linux-kernel@...r.kernel.org, Daniel Stone <daniels@...labora.com>,
        Daniel Vetter <daniel.vetter@...ll.ch>,
        Rob Clark <robdclark@...il.com>,
        Greg Hackmann <ghackmann@...gle.com>,
        John Harrison <John.C.Harrison@...el.com>,
        laurent.pinchart@...asonboard.com, seanpaul@...gle.com,
        marcheu@...gle.com, m.chehab@...sung.com,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Gustavo Padovan <gustavo.padovan@...labora.co.uk>
Subject: Re: [PATCH v3] drm/fence: allow fence waiting to be interrupted by
 userspace

Op 25-08-16 om 18:47 schreef Gustavo Padovan:
> From: Gustavo Padovan <gustavo.padovan@...labora.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@...labora.co.uk>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>