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path: root/include/dt-bindings/clock/berlin2.h
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/*
 * Berlin2 BG2/BG2CD clock tree IDs
 */

#define CLKID_SYS		0
#define CLKID_CPU		1
#define CLKID_DRMFIGO		2
#define CLKID_CFG		3
#define CLKID_GFX		4
#define CLKID_ZSP		5
#define CLKID_PERIF		6
#define CLKID_PCUBE		7
#define CLKID_VSCOPE		8
#define CLKID_NFC_ECC		9
#define CLKID_VPP		10
#define CLKID_APP		11
#define CLKID_AUDIO0		12
#define CLKID_AUDIO2		13
#define CLKID_AUDIO3		14
#define CLKID_AUDIO1		15
#define CLKID_GFX3D_CORE	16
#define CLKID_GFX3D_SYS		17
#define CLKID_ARC		18
#define CLKID_VIP		19
#define CLKID_SDIO0XIN		20
#define CLKID_SDIO1XIN		21
#define CLKID_GFX3D_EXTRA	22
#define CLKID_GC360		23
#define CLKID_SDIO_DLLMST	24
#define CLKID_GETH0		25
#define CLKID_GETH1		26
#define CLKID_SATA		27
#define CLKID_AHBAPB		28
#define CLKID_USB0		29
#define CLKID_USB1		30
#define CLKID_PBRIDGE		31
#define CLKID_SDIO0		32
#define CLKID_SDIO1		33
#define CLKID_NFC		34
#define CLKID_SMEMC		35
#define CLKID_AUDIOHD		36
#define CLKID_VIDEO0		37
#define CLKID_VIDEO1		38
#define CLKID_VIDEO2		39
#define CLKID_TWD		40
i915_vma_unpin_fence() tries to dereference it. It seems to be some race condition where the object is going away at shutdown time, since both times happened when shutting down the X server. The call chains were different: - VT ioctl(KDSETMODE, KD_TEXT): intel_cleanup_plane_fb+0x5b/0xa0 [i915] drm_atomic_helper_cleanup_planes+0x6f/0x90 [drm_kms_helper] intel_atomic_commit_tail+0x749/0xfe0 [i915] intel_atomic_commit+0x3cb/0x4f0 [i915] drm_atomic_commit+0x4b/0x50 [drm] restore_fbdev_mode+0x14c/0x2a0 [drm_kms_helper] drm_fb_helper_restore_fbdev_mode_unlocked+0x34/0x80 [drm_kms_helper] drm_fb_helper_set_par+0x2d/0x60 [drm_kms_helper] intel_fbdev_set_par+0x18/0x70 [i915] fb_set_var+0x236/0x460 fbcon_blank+0x30f/0x350 do_unblank_screen+0xd2/0x1a0 vt_ioctl+0x507/0x12a0 tty_ioctl+0x355/0xc30 do_vfs_ioctl+0xa3/0x5e0 SyS_ioctl+0x79/0x90 entry_SYSCALL_64_fastpath+0x13/0x94 - i915 unpin_work workqueue: intel_unpin_work_fn+0x58/0x140 [i915] process_one_work+0x1f1/0x480 worker_thread+0x48/0x4d0 kthread+0x101/0x140 and this patch purely papers over the issue by adding a NULL pointer check and a WARN_ON_ONCE() to avoid the oops that would then generally make the machine unresponsive. Other callers of i915_gem_object_to_ggtt() seem to also check for the returned pointer being NULL and warn about it, so this clearly has happened before in other places. [ Reported it originally to the i915 developers on Jan 8, applying the ugly workaround on my own now after triggering the problem for the second time with no feedback. This is likely to be the same bug reported as https://bugs.freedesktop.org/show_bug.cgi?id=98829 https://bugs.freedesktop.org/show_bug.cgi?id=99134 which has a patch for the underlying problem, but it hasn't gotten to me, so I'm applying the workaround. ] Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Imre Deak <imre.deak@intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/xen/arm/interface.h')