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From: Philipp Zabel <p.zabel@pengutronix.de>
To: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Daniel Vetter <daniel.vetter@intel.com>,
	Intel Graphics Development <intel-gfx@lists.freedesktop.org>,
	DRI Development <dri-devel@lists.freedesktop.org>
Subject: Re: [PATCH 14/22] drm/imx: Unconfuse preclose logic
Date: Tue, 12 Jan 2016 09:57:28 +0100	[thread overview]
Message-ID: <1452589048.4292.4.camel@pengutronix.de> (raw)
In-Reply-To: <1452548477-15905-15-git-send-email-daniel.vetter@ffwll.ch>

Am Montag, den 11.01.2016, 22:41 +0100 schrieb Daniel Vetter:
> So this one is special, since it tries to prevent races when userspace
> crashes simply by disabling the vblank machinery. Well except that imx
> always has vblanks enabled, and the disable_vblank hook actually just
> tries to cancel a pending pageflip. Without any locking whatsoever. Of
> course this is wrong, since it'll result in the hw not actually
> displaying what drm thinks is the current frontbuffer.
> 
> Well since the core takes care of the disappearing DRM fd now. So we
> can nuke all this confused code without ill side-effects.
> 
> Someone else needs to audit the locking for ->newfb and
> ->page_flip_event and fix it up. Common approach is to reuse
> dev->event_lock for this.
> 
> Cc: Sascha Hauer <s.hauer@pengutronix.de>
> Cc: Philipp Zabel <p.zabel@pengutronix.de>
> Acked-by: Daniel Stone <daniels@collabora.com>
> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>

regards
Philipp

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  reply	other threads:[~2016-01-12  8:57 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-11 21:40 [PATCH 00/22] drm_event cleanup, round 2 Daniel Vetter
2016-01-11 21:40 ` [PATCH 01/22] drm: kerneldoc for drm_fops.c Daniel Vetter
2016-01-11 21:40 ` [PATCH 02/22] drm: Add functions to setup/tear down drm_events Daniel Vetter
2016-01-14 18:46   ` Laurent Pinchart
2016-01-11 21:40 ` [PATCH 03/22] drm/exynos: Use the new event init/free functions Daniel Vetter
2016-01-11 21:40 ` [PATCH 04/22] drm/vmwgfx: " Daniel Vetter
2016-01-11 21:40 ` [PATCH 05/22] drm: Create drm_send_event helpers Daniel Vetter
2016-01-14 18:46   ` Laurent Pinchart
2016-01-11 21:41 ` [PATCH 06/22] drm/fsl: Remove preclose hook Daniel Vetter
2016-01-11 21:41 ` [PATCH 07/22] drm/armada: Remove NULL open/pre/postclose hooks Daniel Vetter
2016-01-12 11:51   ` Russell King - ARM Linux
2016-01-12 12:33     ` Daniel Vetter
2016-01-11 21:41 ` [PATCH 08/22] drm/gma500: Remove empty preclose hook Daniel Vetter
2016-01-12 10:11   ` Patrik Jakobsson
2016-01-11 21:41 ` [PATCH 09/22] drm: Clean up pending events in the core Daniel Vetter
2016-01-14 18:45   ` Laurent Pinchart
2016-01-25 14:45   ` [REGRESSION] " Maarten Lankhorst
2016-01-11 21:41 ` [PATCH 10/22] drm: Nuke vblank event file cleanup code Daniel Vetter
2016-01-25  0:26   ` Laurent Pinchart
2016-01-11 21:41 ` [PATCH 11/22] drm/i915: Nuke intel_modeset_preclose Daniel Vetter
2016-01-11 21:41 ` [PATCH 12/22] drm/atmel: Nuke preclose Daniel Vetter
2016-01-13 14:56   ` Boris Brezillon
2016-01-11 21:41 ` [PATCH 13/22] drm/exynos: Remove event cancelling from postclose Daniel Vetter
2016-01-12  6:13   ` Inki Dae
2016-01-11 21:41 ` [PATCH 14/22] drm/imx: Unconfuse preclose logic Daniel Vetter
2016-01-12  8:57   ` Philipp Zabel [this message]
2016-01-11 21:41 ` [PATCH 15/22] drm/msm: Nuke preclose hooks Daniel Vetter
2016-01-11 21:41 ` [PATCH 16/22] drm/omap: Nuke close hooks Daniel Vetter
2016-01-12 14:09   ` Tomi Valkeinen
2016-01-13 11:00   ` Tomi Valkeinen
2016-01-13 11:05   ` [PATCH] " Daniel Vetter
2016-01-13 23:07     ` Laurent Pinchart
2016-01-11 21:41 ` [PATCH 17/22] drm/rcar: Nuke preclose hook Daniel Vetter
2016-01-11 21:41 ` [PATCH 18/22] drm/shmob: " Daniel Vetter
2016-01-11 21:41 ` [PATCH 19/22] drm/tegra: Stop cancelling page flip events Daniel Vetter
2016-01-13 14:03   ` Thierry Reding
2016-01-11 21:41 ` [PATCH 20/22] drm/tilcdc: Nuke preclose hook Daniel Vetter
2016-01-12 14:19   ` Tomi Valkeinen
2016-01-12 15:12     ` Daniel Vetter
2016-01-13 11:25       ` Tomi Valkeinen
2016-01-11 21:41 ` [PATCH 21/22] drm/vc4: " Daniel Vetter
2016-01-18 17:19   ` Eric Anholt
2016-01-11 21:41 ` [PATCH 22/22] drm/vmwgfx: " Daniel Vetter
2016-01-11 21:41 ` [PATCH] " Daniel Vetter
2016-01-12  8:30 ` ✗ failure: Fi.CI.BAT Patchwork
2016-01-25  7:50 ` [PATCH 00/22] drm_event cleanup, round 2 Daniel Vetter

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