From b4d055a10dbd959d9a11ad2b3fc09490a8e6f2e3 Mon Sep 17 00:00:00 2001
From: Ping Li <pingli@codeaurora.org>
Date: Wed, 23 Sep 2020 17:38:02 -0700
Subject: [PATCH] disp: msm: sde: return proper errno when register event fails

When HW resource is not available, return ENODEV so that user space can
check the errno and do proper handling.

Change-Id: If5422f1020c262ede4ac7226a274da2c5713b446
Signed-off-by: Ping Li <pingli@codeaurora.org>
---
 msm/sde/sde_color_processing.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/msm/sde/sde_color_processing.c b/msm/sde/sde_color_processing.c
index 9c29ac5d99..42b319bbf0 100644
--- a/msm/sde/sde_color_processing.c
+++ b/msm/sde/sde_color_processing.c
@@ -4124,7 +4124,7 @@ int sde_cp_ltm_wb_pb_interrupt(struct drm_crtc *crtc, bool en,
 	hw_dspp = sde_crtc->mixers[0].hw_dspp;
 	if (!hw_dspp) {
 		DRM_ERROR("invalid dspp\n");
-		return -EINVAL;
+		return -ENODEV;
 	}
 
 	if (en) {