[Bug 72631] [BDW]igt/kms_flip/flip-vs-modeset-vs-hang-interruptible randomly causes system hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72631

--- Comment #24 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
I pushed a couple of other things. One patch to prevent the kernel from getting
stuck waiting for page flips, and the other to fail the hang tests when it
didn't actually test anything.

commit 5f190f2d674222b27eff9f80d14761fde2e8fe7a
Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
Date:   Fri Feb 21 16:08:28 2014 +0200

    kms_flip: Fail the subtest if page flip hang recovery wasn't actually
tested

    Context banning can prevent the page flip hang tests from actaully
    testing anything, so make the relevant subtests fail in that case.

    Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>


commit 48ba2cdf969698a2520193ec0c9cff99f89fe1f6
Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
Date:   Fri Feb 21 15:14:33 2014 +0200

    kms_flip: Restore rings to running state in unhang_gpu()

    If things go bad, make sure the rings aren't left in the stopped state.

    Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

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