igt/gem_exec_schedule: Ignore set-priority failures on old kernels

When plugging the device, we need to submit batches at highest priority
so that they cannot be gazumped by the queued requests. On older kernels
that do not support the user changing context priority, all contexts
therefore have the same default priority and we can ignore the error.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: MichaƂ Winiarski <michal.winiarski@intel.com>
1 file changed