lib/igt_kms: Be more verbose about failure in kmstest_wait_for_pageflip

First, we set errno to 0 before doing select() to avoid random pollution
of the assert message with things like:
"Last errno: 25, Inappropriate ioctl for device"

Second, we log explicitly if we exceeded the timeout (ret == 0).

Third, if we fail the select() we log that with some explanation.

Cc: Petri Latvala <petri.latvala@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>

0 files changed, 0 insertions, 0 deletions