linux-kernel - [PATCH] drm/radeon/radeon_connectors.c: add a NULL test before dereference

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Date:	Wed, 30 Dec 2009 12:22:55 +1100
From:	Darren Jenkins <darrenrjenkins@...il.com>
To:	David Airlie <airlied@...ux.ie>,
	dri-devel mailing list <dri-devel@...ts.sourceforge.net>,
	Kernel Janitors <kernel-janitors@...r.kernel.org>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH] drm/radeon/radeon_connectors.c: add a NULL test before
 dereference

The encoder variable can be NULL in this function so I believe it should
be checked before dereference.

Coverity CID: 13253

Signed-off-by: Darren Jenkins <darrenrjenkins@...il.com>

diff --git drivers/gpu/drm/radeon/radeon_connectors.c drivers/gpu/drm/radeon/radeon_connectors.c
index 2016156..b82ae61 100644
--- drivers/gpu/drm/radeon/radeon_connectors.c
+++ drivers/gpu/drm/radeon/radeon_connectors.c
@@ -615,7 +615,7 @@ static enum drm_connector_status radeon_vga_detect(struct drm_connector *connect
 				ret = connector_status_connected;
 		}
 	} else {
-		if (radeon_connector->dac_load_detect) {
+		if (radeon_connector->dac_load_detect && encoder) {
 			encoder_funcs = encoder->helper_private;
 			ret = encoder_funcs->detect(encoder, connector);
 		}


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