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linux-hardened/drivers/gpu/drm
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Jasper St. Pierre aa54e2ee80 drm/atomic_helper: Cope with plane->crtc == NULL in disable helper 
The drm core can call the plane disable hook multiple times, which
means it can get called when plane->crtc is already NULL. That in turn
means we can't get at the implicit acquire ctx we use in the atomic
helpers for legacy entries points.

We could try to pass drm_modeset_legacy_acquire_ctx a drm_device
pointer so that it can cope with a NULL crtc. But that still doesn't
work since the cursor ioctls (remapped with the universal cursor plane
support code) only grabs the crtc locks. So the global acquire context
isn't set eitehr.

The real solution here would be to bite the bullet and wire up
explicit acquire context parameters to all relevant functions. We need
to do that anyway (to be able to get rid of some small allocations
which we can't cope with failing). But that's a lot of work and better
done once atomic has settled a bit.

So meanwhile just catch this case in the helper and bail out.

Signed-off-by: Jasper St. Pierre <jstpierre@mecheye.net>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
[danvet: Completely rewrite commit message and comment but keep
Jasper's logic and author credits since his patch is the only
short-term solution that works.]
Tested-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-11-25 13:12:43 +01:00
..
amd amdkfd: Implement the Get Version IOCTL 2014-11-02 12:18:29 +02:00
armada Linux 3.18-rc4 2014-11-12 17:53:30 +10:00
ast drm: Move drm_crtc_init from drm_crtc.h to drm_plane_helper.h 2014-11-05 00:14:55 +01:00
bochs bochs: add page_flip 2014-11-20 11:27:31 +10:00
bridge
cirrus drm/cirrus: allow 32bpp framebuffers for cirrus drm 2014-11-20 11:42:46 +10:00
exynos drm/panel: Changes for v3.19-rc1 2014-11-15 09:36:13 +10:00
gma500 drm: Miscellaneous fixes for v3.19-rc1 2014-11-15 09:37:20 +10:00
i2c drm/tda998x: update for new drm connector APIs. 2014-08-05 10:34:33 +10:00
i810 drm: move drm_mmap to <drm/drm_legacy.h> 2014-09-24 11:43:07 +10:00
i915 drm/gem: Warn on illegal use of the dumb buffer interface v2 2014-11-21 12:12:41 +10:00
mga drm: move drm_mmap to <drm/drm_legacy.h> 2014-09-24 11:43:07 +10:00
mgag200 drm: Move drm_crtc_init from drm_crtc.h to drm_plane_helper.h 2014-11-05 00:14:55 +01:00
msm drm/msm/mdp4: fix mixer setup for multi-crtc + planes 2014-11-21 15:32:37 -05:00
nouveau drm/gem: Warn on illegal use of the dumb buffer interface v2 2014-11-21 12:12:41 +10:00
omapdrm drm: omapdrm: remove unused variable 2014-11-20 11:29:39 +10:00
panel drm/panel: Add Sharp LQ101R1SX01 support 2014-11-13 13:56:19 +01:00
qxl drm/qxl: drop unused mode private pointer 2014-11-15 10:15:30 +10:00
r128 drm: remove unnecessary sizeof(u8) 2014-11-20 11:30:37 +10:00
radeon Merge branch 'drm-next-3.19' of git://people.freedesktop.org/~agd5f/linux into drm-next 2014-11-21 12:17:43 +10:00
rcar-du drm: Sanitize DRM_IOCTL_MODE_CREATE_DUMB input 2014-11-15 09:50:21 +10:00
savage drm: move drm_mmap to <drm/drm_legacy.h> 2014-09-24 11:43:07 +10:00
shmobile drm: Move drm_crtc_init from drm_crtc.h to drm_plane_helper.h 2014-11-05 00:14:55 +01:00
sis drm: move drm_mmap to <drm/drm_legacy.h> 2014-09-24 11:43:07 +10:00
sti drm: Move drm_crtc_init from drm_crtc.h to drm_plane_helper.h 2014-11-05 00:14:55 +01:00
tdfx drm: move drm_mmap to <drm/drm_legacy.h> 2014-09-24 11:43:07 +10:00
tegra drm/tegra: Changes for v3.19-rc1 2014-11-15 09:38:55 +10:00
tilcdc drm/tilcdc: Deletion of an unnecessary check before the function call "drm_fbdev_cma_hotplug_event" 2014-11-21 12:16:31 +10:00
ttm drm/ttm: Avoid memory allocation from shrinker functions. 2014-11-20 11:31:56 +10:00
udl drm/udl: Deletion of an unnecessary check before the function call "vunmap" 2014-11-21 12:16:35 +10:00
via drm: move drm_mmap to <drm/drm_legacy.h> 2014-09-24 11:43:07 +10:00
vmwgfx drm/vmwgfx: Deletion of an unnecessary check before the function call "vfree" 2014-11-21 12:16:40 +10:00
ati_pcigart.c drm: split ati_pcigart.h out of drmP.h 2014-09-12 14:11:14 +10:00
drm_agpsupport.c drm: move AGP definitions harder 2014-09-10 17:40:11 +10:00
drm_atomic.c drm/atomic: Drop per-plane locking TODO 2014-11-25 13:12:43 +01:00
drm_atomic_helper.c drm/atomic_helper: Cope with plane->crtc == NULL in disable helper 2014-11-25 13:12:43 +01:00
drm_auth.c drm: Move piles of functions from drmP.h to drm_internal.h 2014-09-12 11:16:29 +02:00
drm_bufs.c drm: Move __drm_pci_free to drm_legacy.h 2014-09-12 11:08:56 +02:00
drm_cache.c
drm_context.c drm: mark drm_context support as legacy 2014-08-05 19:38:12 +02:00
drm_crtc.c drm: s/enum_blob_list/enum_list/ in drm_property 2014-11-20 11:35:21 +10:00
drm_crtc_helper.c drm/atomic: Refcounting for plane_state->fb 2014-11-06 21:08:37 +01:00
drm_crtc_internal.h
drm_debugfs.c drm: Move piles of functions from drmP.h to drm_internal.h 2014-09-12 11:16:29 +02:00
drm_dma.c drm: Move legacy buffer structures to <drm/drm_legacy.h> 2014-09-12 15:28:12 +02:00
drm_dp_helper.c drm/dp: Add counters in the drm_dp_aux struct for I2C NACKs and DEFERs 2014-11-05 14:03:22 +01:00
drm_dp_mst_topology.c drm/dp/mst: Handle invalid link bandwidth from DPCD gracefully 2014-11-15 09:31:34 +10:00
drm_drv.c drm: Document that drm_dev_alloc doesn't need a parent 2014-11-25 13:12:42 +01:00
drm_edid.c drm/edid: Add missing interlaced flag to 576i@100 modes. 2014-10-01 11:36:20 +02:00
drm_edid_load.c drm/edid: Deletion of an unnecessary check before the function call "release_firmware" 2014-11-21 12:16:27 +10:00
drm_encoder_slave.c
drm_fb_cma_helper.c
drm_fb_helper.c drm: Remove compiler BUG_ON() test 2014-11-04 09:47:45 +01:00
drm_flip_work.c drm: flip-work: change drm_flip_work_init prototype 2014-11-15 09:29:14 +10:00
drm_fops.c drm: Implement O_NONBLOCK support on /dev/dri/cardN 2014-10-08 15:07:07 +02:00
drm_gem.c drm: Sanitize DRM_IOCTL_MODE_CREATE_DUMB input 2014-11-15 09:50:21 +10:00
drm_gem_cma_helper.c drm/cma: Remove call to drm_gem_free_mmap_offset() 2014-11-13 13:27:33 +01:00
drm_global.c
drm_hashtab.c list: fix order of arguments for hlist_add_after(_rcu) 2014-08-06 18:01:24 -07:00
drm_info.c drm: Extract <drm/drm_gem.h> 2014-09-24 11:43:41 +10:00
drm_internal.h drm: Move internal debugfs functions to drm_internal.h 2014-09-24 11:43:35 +10:00
drm_ioc32.c
drm_ioctl.c drm: Purge ioctl forward declarations from drmP.h 2014-09-12 15:27:47 +02:00
drm_irq.c drm/irq: BUG_ON() -> WARN_ON() 2014-11-20 11:33:51 +10:00
drm_legacy.h drm: Create drm legacy driver header 2014-09-12 11:08:55 +02:00
drm_lock.c drm: unexport drm_global_mutex 2014-09-12 11:19:47 +02:00
drm_memory.c drm: Move drm_memory.c map support declarations to <drm/drm_legacy.h> 2014-09-12 15:28:12 +02:00
drm_mipi_dsi.c drm/dsi: Do not require .owner field to be set 2014-11-13 13:56:17 +01:00
drm_mm.c
drm_modes.c gpu:drm: Fix typo in Documentation/DocBook/drm.xml 2014-10-21 10:55:33 +02:00
drm_modeset_lock.c drm: Per-plane locking 2014-11-12 17:56:12 +10:00
drm_of.c
drm_panel.c
drm_pci.c drm: Move legacy buffer structures to <drm/drm_legacy.h> 2014-09-12 15:28:12 +02:00
drm_plane_helper.c Merge remote-tracking branch 'airlied/drm-next' into HEAD 2014-11-10 10:55:35 +01:00
drm_platform.c drm: Goody bye, drm_bus! 2014-09-10 17:43:10 +10:00
drm_prime.c drm: Miscellaneous fixes for v3.19-rc1 2014-11-15 09:37:20 +10:00
drm_probe_helper.c drm: Fix DRM_FORCE_ON_DIGITAL use 2014-11-04 09:45:04 +01:00
drm_rect.c
drm_scatter.c drm: Move sg functions into drm_legacy.h 2014-09-12 11:08:54 +02:00
drm_sysfs.c drm: Move piles of functions from drmP.h to drm_internal.h 2014-09-12 11:16:29 +02:00
drm_trace.h
drm_trace_points.c
drm_vm.c drm: Move drm_vm_open_locked into drm_internal.h 2014-09-24 11:43:20 +10:00
drm_vma_manager.c
Kconfig drm: merge drm_usb into udl 2014-09-10 17:43:27 +10:00
Makefile drm: Add atomic/plane helpers 2014-11-05 18:07:01 +01:00