[Bug 109580] [CI][DRMTIP] igt at gem_ringfill@basic-default-hang - dmesg-fail - Failed assertion: __gem_execbuf(fd, execbuf) == 0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109580

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #3 from Chris Wilson <chris at chris-wilson.co.uk> ---
commit c41166f9a145f1c4ce2961b338f9b57495ace4b5 (HEAD -> drm-intel-next-queued,
drm-intel/drm-intel-next-queued)
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Wed Feb 20 14:56:37 2019 +0000

    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 at chris-wilson.co.uk>
    Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
    Reviewed-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>
    Link:
https://patchwork.freedesktop.org/patch/msgid/20190220145637.23503-1-chris@chris-wilson.co.uk

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