[PATCH i-g-t 1/4] lib/igt_sysfs: Add support for device unbinding

[Satyanarayana K V P]

It does not harm anything when we try to unbind a device which
is already unbinded. We do not want to throw assertion when
the device is already unbinded.

Signed-off-by: Satyanarayana K V P <satyanarayana.k.v.p at intel.com>
Cc: Michał Wajdeczko <michal.wajdeczko at intel.com>
Cc: Francois Dugast <francois.dugast at intel.com>
---
 lib/igt_sysfs.c | 4 ++++
 lib/igt_sysfs.h | 1 +
 2 files changed, 5 insertions(+)

diff --git a/lib/igt_sysfs.c b/lib/igt_sysfs.c
index 2e4c2ee63..3fffaf96b 100644
--- a/lib/igt_sysfs.c
+++ b/lib/igt_sysfs.c
@@ -1509,6 +1509,10 @@ int xe_sysfs_driver_do(int xe_device, char pci_slot[], enum xe_sysfs_driver_acti
 		igt_assert(igt_sysfs_set(sysfs, "unbind", pci_slot));
 		close(sysfs);
 		break;
+	case XE_SYSFS_DRIVER_TRY_UNBIND:
+		igt_sysfs_set(sysfs, "unbind", pci_slot);
+		close(sysfs);
+		break;
 	case XE_SYSFS_DRIVER_REBIND:
 		igt_assert(igt_sysfs_set(sysfs, "unbind", pci_slot));
 
diff --git a/lib/igt_sysfs.h b/lib/igt_sysfs.h
index 86345f3d1..cc4971e70 100644
--- a/lib/igt_sysfs.h
+++ b/lib/igt_sysfs.h
@@ -187,6 +187,7 @@ enum xe_sysfs_driver_action {
 	XE_SYSFS_DRIVER_BIND,
 	XE_SYSFS_DRIVER_TRY_BIND,
 	XE_SYSFS_DRIVER_UNBIND,
+	XE_SYSFS_DRIVER_TRY_UNBIND,
 	XE_SYSFS_DRIVER_REBIND,
 };
 
-- 
2.35.3