From: Russell King - ARM Linux <linux@arm.linux.org.uk>
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 11/18] drm/armada: Don't grab dev->struct_mutex for in mmap offset ioctl
Date: Mon, 10 Aug 2015 12:15:27 +0100 [thread overview]
Message-ID: <20150810111527.GS7557@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1436477570-4936-12-git-send-email-daniel.vetter@ffwll.ch>
On Thu, Jul 09, 2015 at 11:32:43PM +0200, Daniel Vetter wrote:
> Since David Herrmann's mmap vma manager rework we don't need to grab
> dev->struct_mutex any more to prevent races when looking up the mmap
> offset. Drop it and instead don't forget to use the unref_unlocked
> variant (since the drm core still cares).
>
> While at it also fix a leak when this ioctl is called on an imported
> buffer.
Good catch, thanks Daniel. I'd prefer these to be two different commits
though, so that the leak can be easily backported to stable kernels if
needed.
I suspect this should go through the same tree that David's work is,
otherwise we end up with random dependencies between trees. With the
bug fix separated out:
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
--
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next prev parent reply other threads:[~2015-08-10 11:15 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-09 21:32 [PATCH 00/18] dev->struct_mutex crusade Daniel Vetter
2015-07-09 21:32 ` [PATCH 01/18] drm/gem: rip out drm vma accounting for gem mmaps Daniel Vetter
2015-07-11 21:11 ` Chris Wilson
2015-07-14 10:21 ` Daniel Vetter
2015-08-10 11:32 ` Thierry Reding
2015-07-09 21:32 ` [PATCH 02/18] drm/cma-helper: Fix locking in drm_fb_cma_debugfs_show Daniel Vetter
2015-08-10 10:41 ` Thierry Reding
2015-07-09 21:32 ` [PATCH 03/18] drm/gem: Be more friendly with locking checks Daniel Vetter
2015-08-10 10:42 ` Thierry Reding
2015-08-10 11:43 ` Daniel Vetter
2015-07-09 21:32 ` [PATCH 04/18] drm/ast: Don't grab dev->struct_mutex for in mmap offset ioctl Daniel Vetter
2015-08-10 10:46 ` Thierry Reding
2015-07-09 21:32 ` [PATCH 05/18] drm/bochs: " Daniel Vetter
2015-08-10 10:45 ` Thierry Reding
2015-07-09 21:32 ` [PATCH 06/18] drm/mga200g: " Daniel Vetter
2015-08-10 10:46 ` Thierry Reding
2015-07-09 21:32 ` [PATCH 07/18] drm/mga200g: Hold a proper reference for cursor_set Daniel Vetter
2015-08-10 10:46 ` Thierry Reding
2015-07-09 21:32 ` [PATCH 08/18] drm/cirrus: Don't grab dev->struct_mutex for in mmap offset ioctl Daniel Vetter
2015-08-10 10:53 ` Thierry Reding
2015-07-09 21:32 ` [PATCH 09/18] drm/cma-helper: " Daniel Vetter
2015-08-10 10:54 ` Thierry Reding
2015-07-09 21:32 ` [PATCH 10/18] drm/rockchip: " Daniel Vetter
2015-08-10 10:58 ` Thierry Reding
2015-07-09 21:32 ` [PATCH 11/18] drm/armada: " Daniel Vetter
2015-08-10 10:59 ` Thierry Reding
2015-08-10 11:15 ` Russell King - ARM Linux [this message]
2015-07-09 21:32 ` [PATCH 12/18] drm/nouveau: Don't take dev->struct_mutex in fbcon init Daniel Vetter
2015-08-10 10:59 ` Thierry Reding
2015-07-09 21:32 ` [PATCH 13/18] drm/nouveau: Don't take dev->struct_mutex in ttm_fini Daniel Vetter
2015-08-10 10:59 ` Thierry Reding
2015-07-09 21:32 ` [PATCH 14/18] drm/qxl: Don't take dev->struct_mutex in bo_force_delete Daniel Vetter
2015-08-10 10:59 ` Thierry Reding
2015-07-09 21:32 ` [PATCH 15/18] drm/radeon: " Daniel Vetter
2015-08-10 11:00 ` Thierry Reding
2015-07-09 21:32 ` [PATCH 16/18] drm/radeon: Don't take dev->struct_mutex in pm functions Daniel Vetter
2015-08-10 11:00 ` Thierry Reding
2015-07-09 21:32 ` [PATCH 17/18] drm/amdgpu: Don't take dev->struct_mutex in bo_force_delete Daniel Vetter
2015-08-10 10:53 ` Thierry Reding
2015-07-09 21:32 ` [PATCH 18/18] drm/amdgpu: don't grab dev->struct_mutex in pm functions Daniel Vetter
2015-07-10 0:20 ` shuang.he
2015-08-10 11:00 ` Thierry Reding
2015-07-15 13:38 ` [PATCH 1/2] drm/tegra: don't take dev->struct_mutex in mmap offset ioctl Daniel Vetter
2015-07-15 13:38 ` [PATCH 2/2] drm/tegra: Use drm_gem_object_reference_unlocked Daniel Vetter
2015-07-19 10:43 ` shuang.he
2015-08-10 10:30 ` [PATCH 1/2] drm/tegra: don't take dev->struct_mutex in mmap offset ioctl Thierry Reding
2015-08-10 11:31 ` Daniel Vetter
2015-08-10 11:38 ` Thierry Reding
2015-08-10 11:35 ` [PATCH 00/18] dev->struct_mutex crusade Thierry Reding
2015-08-10 11:53 ` Chris Wilson
2015-08-10 11:56 ` Thierry Reding
2015-08-10 12:00 ` Daniel Vetter
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