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/i915_request.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/i915_request.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_request.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c index a61e3a4fc9dc..124b3e279c88 100644 --- a/drivers/gpu/drm/i915/i915_request.c +++ b/drivers/gpu/drm/i915/i915_request.c @@ -559,8 +559,9 @@ i915_request_alloc(struct intel_engine_cs *engine, struct i915_gem_context *ctx) * ABI: Before userspace accesses the GPU (e.g. execbuffer), report * EIO if the GPU is already wedged. */ - if (i915_terminally_wedged(&i915->gpu_error)) - return ERR_PTR(-EIO); + ret = i915_terminally_wedged(i915); + if (ret) + return ERR_PTR(ret); /* * Pinning the contexts may generate requests in order to acquire |