[igt-dev] [PATCH i-g-t v5 3/4] lib/igt_v3d: Rework igt_v3d_get_param()

["Maíra Canal" <mcanal@igalia.com>]

Instead of assuming that igt_v3d_get_param() will succeed, allow the
ioctl to fail and return 0. This way, it will be possible to check if the
kernel has the capabilities needed by the test by checking if the return
of the igt_v3d_get_param() function is different than zero.

Signed-off-by: Maíra Canal <mcanal@igalia.com>
---
 lib/igt_v3d.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/lib/igt_v3d.c b/lib/igt_v3d.c
index 68d11d7f..5d112416 100644
--- a/lib/igt_v3d.c
+++ b/lib/igt_v3d.c
@@ -86,14 +86,27 @@ igt_v3d_get_bo_offset(int fd, uint32_t handle)
 	return get.offset;
 }
 
+/**
+ * igt_v3d_get_param:
+ * @fd: device file descriptor
+ * @param: v3d parameter
+ *
+ * This wraps the GET_PARAM ioctl.
+ *
+ * Returns the current value of the parameter. If the parameter is
+ * invalid, returns 0.
+ */
 uint32_t
 igt_v3d_get_param(int fd, enum drm_v3d_param param)
 {
 	struct drm_v3d_get_param get = {
 		.param = param,
 	};
+	int ret;
 
-	do_ioctl(fd, DRM_IOCTL_V3D_GET_PARAM, &get);
+	ret = igt_ioctl(fd, DRM_IOCTL_V3D_GET_PARAM, &get);
+	if (ret)
+		return 0;
 
 	return get.value;
 }
-- 
2.39.0