drm/i915: Restore engine->submit_request before unwedging

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When we wedge the device, we override engine->submit_request with a nop
to ensure that all in-flight requests are marked in error. However, igt
would like to unwedge the device to test -EIO handling. This requires us
to flush those in-flight requests and restore the original
engine->submit_request.

v2: Use a vfunc to unify enabling request submission to engines
v3: Split new vfunc to a separate patch.
v4: Make the wait interruptible -- the third party fences we wait upon
may be indefinitely broken, so allow the reset to be aborted.

Fixes: 821ed7df6e ("drm/i915: Update reset path to fix incomplete requests")
Testcase: igt/gem_eio
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> #v3
Link: http://patchwork.freedesktop.org/patch/msgid/20170316171305.12972-3-chris@chris-wilson.co.uk

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This commit is contained in:

Chris Wilson 2017-03-16 17:13:04 +00:00

parent ff44ad51eb

commit 2e8f9d3229

3 changed files with 66 additions and 3 deletions

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9

drivers/gpu/drm/i915/i915_drv.c

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1

drivers/gpu/drm/i915/i915_drv.h

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59

drivers/gpu/drm/i915/i915_gem.c

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