diff options
author | Chris Wilson <chris@chris-wilson.co.uk> | 2019-02-20 14:56:37 +0000 |
---|---|---|
committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-02-20 16:31:08 +0000 |
commit | c41166f9a145f1c4ce2961b338f9b57495ace4b5 (patch) | |
tree | 137e4dc4097be291198f44c822469ae4804ae751 /drivers/gpu/drm/i915/selftests/igt_flush_test.c | |
parent | 47ed55a9bb9e284d46d6f2489e32a53b59152809 (diff) |
drm/i915: Beware temporary wedging when determining -EIO
At a few points in our uABI, we check to see if the driver is wedged and
report -EIO back to the user in that case. However, as we perform the
check and reset asynchronously (where once before they were both
serialised by the struct_mutex), we may instead see the temporary wedging
used to cancel inflight rendering to avoid a deadlock during reset
(caused by either us timing out in our reset handler,
i915_wedge_on_timeout or with malice aforethought in intel_reset_prepare
for a stuck modeset). If we suspect this is the case, that is we see a
wedged driver *and* reset in progress, then wait until the reset is
resolved before reporting upon the wedged status.
v2: might_sleep() (Mika)
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109580
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190220145637.23503-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/selftests/igt_flush_test.c')
-rw-r--r-- | drivers/gpu/drm/i915/selftests/igt_flush_test.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/selftests/igt_flush_test.c b/drivers/gpu/drm/i915/selftests/igt_flush_test.c index af66e3d4e23a..e0d3122fd35a 100644 --- a/drivers/gpu/drm/i915/selftests/igt_flush_test.c +++ b/drivers/gpu/drm/i915/selftests/igt_flush_test.c @@ -29,5 +29,5 @@ int igt_flush_test(struct drm_i915_private *i915, unsigned int flags) i915_gem_set_wedged(i915); } - return i915_terminally_wedged(&i915->gpu_error) ? -EIO : 0; + return i915_terminally_wedged(i915); } |