Re: [PATCH IGT] tests/chamelium: Close DRM file descriptor after tests

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On Wed, 2017-06-14 at 10:36 +0100, Chris Wilson wrote:
> Quoting Paul Kocialkowski (2017-06-12 16:21:45)
> > On Mon, 2017-06-12 at 17:39 +0300, Paul Kocialkowski wrote:
> > > This adds a call to close the DRM file descriptor. It is reauired as IGT
> > > will attempt to become DRM master after running the test, resulting in a
> > > failure.
> > 
> > This should fix (at least) 3 of the failures seen on the CI machine that
> > runs
> > chamelium tests.
> 
> This would be papering over the bug in the atexit handlers if they
> assume they can become drm master and worse cause a failure it they
> don't. I was not aware that the core made that presumption, so more
> details would be useful.

Here is the log from running the dp-hpd-storm test:

IGT-Version: 1.19-geeeb304a (x86_64) (Linux: 4.12.0-rc4-ARCH+ x86_64)
Subtest dp-hpd-storm: SUCCESS (8.917s)
Test requirement not met in function require_connector_present, file
chamelium.c:99:
Test requirement: found
No port of type HDMI-A was found
Test requirement not met in function require_connector_present, file
chamelium.c:99:
Test requirement: found
No port of type VGA was found
Test requirement not met in function drm_open_driver_master, file drmtest.c:391:
Test requirement: drmSetMaster(fd) == 0
Can't become DRM master, please check if no other DRM client is running.
Last errno: 22, Invalid argument
chamelium: igt_core.c:955: igt_skip: Assertion `in_fixture' failed.
./chamelium.sh: line 3:  8566 Aborted                 (core dumped)
/usr/local/libexec/intel-gpu-tools/chamelium "$@"

Which is actually called by igt_hpd_storm_exit_handler in order to call
igt_hpd_storm_reset with the drm fd.

Thinking about it, I should have made it clear in the commit message that this
is very specific to the hpd storm feature testing.

-- 
Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxxxxxx>
Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo
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