[i-g-t PATCH] tests: do snd_hda_intel unbind before unload in module reload test

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Try to make sure the snd_hda_intel module is not in use, and can be
unloaded.

Cc: Keqiao Zhang <keqiao.zhang@xxxxxxxxx>
Cc: Libin Yang <libin.yang@xxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>

---

Keqiao, Libin, here's the script this patch is against:

https://cgit.freedesktop.org/drm/igt-gpu-tools/tree/tests/drv_module_reload_basic
---
 tests/drv_module_reload_basic | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tests/drv_module_reload_basic b/tests/drv_module_reload_basic
index b8cad88133e9..c0676fc65db0 100755
--- a/tests/drv_module_reload_basic
+++ b/tests/drv_module_reload_basic
@@ -33,6 +33,9 @@ function reload() {
 	pkill alsactl
 	snd_hda_intel_unloaded=0
 	if mod_loaded snd_hda_intel; then
+		if [ -e /sys/bus/pci/drivers/snd_hda_intel/unbind ]; then
+			echo "0000:00:03.0" > /sys/bus/pci/drivers/snd_hda_intel/unbind
+		fi
 		if rmmod snd_hda_intel; then
 			snd_hda_intel_unloaded=1
 		else
-- 
2.1.4

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