Chris Wilson cfe7288c27 drm/i915: Lock the engine while dumping the active request ... We cannot let the request be retired and freed while we are trying to dump it during error capture. It is not sufficient just to grab a reference to the request, as during retirement we may free the ring which we are also dumping. So take the engine lock to prevent retiring and freeing of the request. Reported-by: Alex Shumsky <alexthreed@gmail.com> Fixes: 83c317832e ("drm/i915: Dump the ringbuffer of the active request for debugging") Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Alex Shumsky <alexthreed@gmail.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190715080946.15593-6-chris@chris-wilson.co.uk		2019-07-16 13:19:34 +01:00
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drm	drm/i915: Lock the engine while dumping the active request	2019-07-16 13:19:34 +01:00
host1x	drm/tegra: Changes for v5.3-rc1	2019-06-25 12:59:43 +10:00
ipu-v3	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288	2019-06-05 17:36:37 +02:00
vga	topic/remove-fbcon-notifiers:	2019-06-26 12:26:34 +02:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00