Only EINVAL was being used to account for older kernels,
but on legacy kernels that don't use i915_edp_psr_debug,
the ENOENT error will be thrown. This changes the logic
to also account for ENOENT errors.

Signed-off-by: Casey Bowman <redacted>
---
 lib/igt_psr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/igt_psr.c b/lib/igt_psr.c
index 0ddfb64f..8cb41a55 100644
--- a/lib/igt_psr.c
+++ b/lib/igt_psr.c

@@ -103,7 +103,7 @@ static bool psr_set(int debugfs_fd, bool enable)
 		return false;
 	}
 
-	if (ret == -EINVAL) {
+	if (ret == -EINVAL || ret == -ENOENT) {
 		ret = psr_modparam_set(enable);
 	} else {
 		ret = psr_write(debugfs_fd, enable ? "0x3" : "0x1");

-- 
2.19.0

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