target/linux/brcm2708/patches-4.4/0332-drm-vc4-Fix-NULL-deref-in-HDMI-init-error-path.patch


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From bdd15a0ce3a80e58e6f3c38c11cc33f1781b8394 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Mon, 4 Apr 2016 14:25:59 -0700
Subject: [PATCH] drm/vc4: Fix NULL deref in HDMI init error path

If you make it here other than through err_destroy_encoder, vc4->hdmi
is still NULL.

Signed-off-by: Eric Anholt <eric@anholt.net>
(cherry picked from commit 5883980313af70aec0ceebaef6ef0709726e5e63)
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -573,7 +573,7 @@ err_unprepare_hsm:
 err_unprepare_pix:
 	clk_disable_unprepare(hdmi->pixel_clock);
 err_put_i2c:
-	put_device(&vc4->hdmi->ddc->dev);
+	put_device(&hdmi->ddc->dev);
 
 	return ret;
 }