Boris Brezillon f7aef1c207 drm/vc4: Make sure vc4_bo_{inc,dec}_usecnt() calls are balanced ... Commit b9f19259b8 ("drm/vc4: Add the DRM_IOCTL_VC4_GEM_MADVISE ioctl") introduced a mechanism to mark some BOs as purgeable to allow the driver to drop them under memory pressure. In order to implement this feature we had to add a mechanism to mark BOs as currently used by a piece of hardware which materialized through the ->usecnt counter. Plane code is supposed to increment usecnt when it attaches a BO to a plane and decrement it when it's done with this BO, which was done in the ->prepare_fb() and ->cleanup_fb() hooks. The problem is, async page flip logic does not go through the regular atomic update path, and ->prepare_fb() and ->cleanup_fb() are not called in this case. Fix that by manually calling vc4_bo_{inc,dec}_usecnt() in the async-page-flip path. Note that all this should go away as soon as we get generic async page flip support in the core, in the meantime, this fix should do the trick. Fixes: b9f19259b8 ("drm/vc4: Add the DRM_IOCTL_VC4_GEM_MADVISE ioctl") Reported-by: Peter Robinson <pbrobinson@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Eric Anholt <eric@anholt.net> Link: https://patchwork.freedesktop.org/patch/msgid/20180430133232.32457-1-boris.brezillon@bootlin.com Link: https://patchwork.freedesktop.org/patch/msgid/20180430133232.32457-1-boris.brezillon@bootlin.com		2018-04-30 12:36:28 -07:00
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drm	drm/vc4: Make sure vc4_bo_{inc,dec}_usecnt() calls are balanced	2018-04-30 12:36:28 -07:00
host1x
ipu-v3	gpu: ipu-v3: prg: avoid possible array underflow	2018-03-15 17:52:08 +01:00
vga	vga_switcheroo: Let HDA autosuspend on mux change	2018-03-13 22:58:49 +01:00
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