Check file path of the drm node

if file path of the drm node is not exsit,
this patch makes to use another the drm node.

Change-Id: I8346f70cf1a5534fa96396a0344f42b6e81e2f48

1 files changed, 16 insertions, 1 deletions

diff --git a/src/tdm_backend_drm.c b/src/tdm_backend_drm.c
index ac8c091..36b809e 100644
--- a/src/tdm_backend_drm.c
+++ b/src/tdm_backend_drm.c
@@ -87,13 +87,22 @@ fail:
 	return 0;
 }
 
+static int
+_tdm_drm_file_check(const char *filepath)
+{
+	if(access(filepath, F_OK) != -1)
+		return 1;
+
+	return 0;
+}
+
 static struct udev_device *
 _tdm_drm_find_primary_gpu(void)
 {
 	struct udev *udev;
 	struct udev_enumerate *e;
 	struct udev_list_entry *entry;
-	const char *path, *id;
+	const char *path, *id, *filename;
 	struct udev_device *device, *drm_device, *pci;
 
 	udev = udev_new();
@@ -129,6 +138,12 @@ _tdm_drm_find_primary_gpu(void)
 			continue;
 		}
 
+		filename = udev_device_get_devnode(device);
+		if (!_tdm_drm_file_check(filename)) {
+			udev_device_unref(device);
+			continue;
+		}
+
 		if (!_tdm_drm_is_kms(device)) {
 			udev_device_unref(device);
 			continue;