From 564447706c8ca3f9dfadbc2e849fff0aec2fc38d Mon Sep 17 00:00:00 2001
From: "Gustavo A. R. Silva" <garsilva@embeddedor.com>
Date: Thu, 6 Jul 2017 16:58:33 -0500
Subject: [PATCH] UPSTREAM: drm/rockchip: fix NULL check on devm_kzalloc()
 return value

The right variable to check here is port, not dp.

This issue was detected using Coccinelle and the following semantic patch:

@@
expression x;
identifier fld;
@@

* x = devm_kzalloc(...);
  ... when != x == NULL
  x->fld

Change-Id: Iba535170f6ba6e8b6e3f53e898a79957e753229c
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Acked-by: Mark Yao <mark.yao@rock-chips.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170706215833.GA25411@embeddedgus
Signed-off-by: Wyon Bi <bivvy.bi@rock-chips.com>
(cherry picked from commit 6f6e0b217a93011f8e11b9a2d5521a08fcf36990)
---
 drivers/gpu/drm/rockchip/cdn-dp-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.c b/drivers/gpu/drm/rockchip/cdn-dp-core.c
index a537782389fa..5eb7a23d547f 100644
--- a/drivers/gpu/drm/rockchip/cdn-dp-core.c
+++ b/drivers/gpu/drm/rockchip/cdn-dp-core.c
@@ -1257,7 +1257,7 @@ static int cdn_dp_probe(struct platform_device *pdev)
 			continue;
 
 		port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
-		if (!dp)
+		if (!port)
 			return -ENOMEM;
 
 		port->extcon = extcon;