[ 3.5.y.z extended stable ] Patch "drm/radeon/hdmi: make sure we have an afmt block assigned" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    drm/radeon/hdmi: make sure we have an afmt block assigned

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 6a710f2267239e028cff45f75abdd3002a770c41 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher at amd.com>
Date: Mon, 8 Jul 2013 18:16:56 -0400
Subject: [PATCH] drm/radeon/hdmi: make sure we have an afmt block assigned

commit c2b4cacfe9816c1fe378c785ce8a678cf0635ec6 upstream.

Prevents a segfault if an afmt block is not assigned to the
encoder such as in the LVDS or eDP case.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=66714

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
[ luis: backported to 3.5:
  - adjusted context
  - dropped changes to evergreen_hdmi_enable() ]
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/gpu/drm/radeon/evergreen_hdmi.c | 3 +++
 drivers/gpu/drm/radeon/r600_hdmi.c      | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/radeon/evergreen_hdmi.c b/drivers/gpu/drm/radeon/evergreen_hdmi.c
index 65c5416..44b3b07 100644
--- a/drivers/gpu/drm/radeon/evergreen_hdmi.c
+++ b/drivers/gpu/drm/radeon/evergreen_hdmi.c
@@ -156,6 +156,9 @@ void evergreen_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode
 	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
 	uint32_t offset;

+	if (!dig || !dig->afmt)
+		return;
+
 	/* Silent, r600_hdmi_enable will raise WARN for us */
 	if (!dig->afmt->enabled)
 		return;
diff --git a/drivers/gpu/drm/radeon/r600_hdmi.c b/drivers/gpu/drm/radeon/r600_hdmi.c
index 26ce6c1..949bf83 100644
--- a/drivers/gpu/drm/radeon/r600_hdmi.c
+++ b/drivers/gpu/drm/radeon/r600_hdmi.c
@@ -322,6 +322,9 @@ void r600_hdmi_setmode(struct drm_encoder *encoder, struct drm_display_mode *mod
 	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
 	uint32_t offset;

+	if (!dig || !dig->afmt)
+		return;
+
 	/* Silent, r600_hdmi_enable will raise WARN for us */
 	if (!dig->afmt->enabled)
 		return;
@@ -480,6 +483,9 @@ void r600_hdmi_enable(struct drm_encoder *encoder)
 	uint32_t offset;
 	u32 hdmi;

+	if (!dig || !dig->afmt)
+		return;
+
 	if (ASIC_IS_DCE6(rdev))
 		return;

--
1.8.1.2