Matt Roper 7118fd9bd9 drm/fb-helper: Use proper plane mask for fb cleanup ... pan_display_atomic() calls drm_atomic_clean_old_fb() to sanitize the legacy FB fields (plane->fb and plane->old_fb). However it was building the plane mask to pass to this function incorrectly (the bitwise OR was using plane indices rather than plane masks). The end result was that sometimes the legacy pointers would become out of sync with the atomic pointers. If another operation tried to re-set the same FB onto the plane, we might end up with the pointers back in sync, but improper reference counts, which would eventually lead to system crashes when we accessed a pointer to a prematurely-destroyed FB. The cause here was a very subtle bug introduced in commit: commit 07d3bad6c1 Author: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Date: Wed Nov 11 11:29:11 2015 +0100 drm/core: Fix old_fb handling in pan_display_atomic. I found the crashes were most easily reproduced (on i915 at least) by starting X and then VT switching to a VT that wasn't running a console instance...the sequence of vt/fbcon entries that happen in that case trigger a reference count mismatch and crash the system. Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93313 Signed-off-by: Matt Roper <matthew.d.roper@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>		2015-12-21 09:54:49 +01:00
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drm	drm/fb-helper: Use proper plane mask for fb cleanup	2015-12-21 09:54:49 +01:00
host1x	gpu: host1x: Fix MLOCK's debug info	2015-10-02 14:40:12 +02:00
ipu-v3	gpu: ipu-v3: Assign of_node of child platform devices to corresponding ports	2015-11-24 11:30:17 +01:00
vga	vga_switcheroo: Drop client power state VGA_SWITCHEROO_INIT	2015-11-05 11:07:36 +10:00
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