#!/bin/sh
#
# This check if we can crash the kernel with segmentation-fault
# by reading /sys/kernel/debug/dri/0/i915_emon_status too quickly
#

if [ -d /debug/dri ] ; then
	debugfs_path=/debug_dri
fi

if [ -d /sys/kernel/debug/dri ] ; then
	debugfs_path=/sys/kernel/debug/dri
fi

i915_path=x
for dir in `ls $debugfs_path` ; do
	if [ -f $debugfs_path/$dir/i915_error_state ] ; then
		i915_path=$debugfs_path/$dir
		break
	fi
done

if [ $i915_path = "x" ] ; then
	echo i915 debugfs path not found.
	exit 1
fi

for z in $(seq 1 1000); do
	cat $i915_path/i915_emon_status > /dev/null
done

# If we got here, we haven't crashed

exit 0