From: Colin Ian King <colin.king@canonical.com>
Date: Tue, 26 Jun 2018 17:03:54 +0100
Subject: drm/panel: ili9881c: Fix missing assignment to error return ret
Git-commit: 3d5664f95ebe264c16f3ebfadce9eee6fee9acf7
Patch-mainline: v4.19-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Currently, ret is being checked for an error condition however it
is not being assigned in the previous statement on the call of
function mipi_dsi_dcs_exit_sleep_mode.  Add in the missing assignment
of ret.

Detected by CoverityScan, CID#1470174, 1470178 ("Unchecked return value")

Fixes: 26aec25593c2 ("drm/panel: Add Ilitek ILI9881c panel driver")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180626160354.1363-1-colin.king@canonical.com

Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/panel/panel-ilitek-ili9881c.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
+++ b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
@@ -334,7 +334,7 @@ static int ili9881c_prepare(struct drm_p
 	if (ret)
 		return ret;
 
-	mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
+	ret = mipi_dsi_dcs_exit_sleep_mode(ctx->dsi);
 	if (ret)
 		return ret;