From: <gregkh@linuxfoundation.org>
To: alexander.deucher@amd.com, gregkh@linuxfoundation.org
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "drm/radeon/combios: add some validation of lvds values" has been added to the 4.1-stable tree
Date: Mon, 10 Aug 2015 14:35:16 -0700 [thread overview]
Message-ID: <1439242516167110@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
drm/radeon/combios: add some validation of lvds values
to the 4.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-radeon-combios-add-some-validation-of-lvds-values.patch
and it can be found in the queue-4.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From 0a90a0cff9f429f886f423967ae053150dce9259 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Mon, 27 Jul 2015 19:24:31 -0400
Subject: drm/radeon/combios: add some validation of lvds values
From: Alex Deucher <alexander.deucher@amd.com>
commit 0a90a0cff9f429f886f423967ae053150dce9259 upstream.
Fixes a broken hsync start value uncovered by:
abc0b1447d4974963548777a5ba4a4457c82c426
(drm: Perform basic sanity checks on probed modes)
The driver handled the bad hsync start elsewhere, but
the above commit prevented it from getting added.
bug:
https://bugs.freedesktop.org/show_bug.cgi?id=91401
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpu/drm/radeon/radeon_combios.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/radeon/radeon_combios.c
+++ b/drivers/gpu/drm/radeon/radeon_combios.c
@@ -1255,10 +1255,15 @@ struct radeon_encoder_lvds *radeon_combi
if ((RBIOS16(tmp) == lvds->native_mode.hdisplay) &&
(RBIOS16(tmp + 2) == lvds->native_mode.vdisplay)) {
+ u32 hss = (RBIOS16(tmp + 21) - RBIOS16(tmp + 19) - 1) * 8;
+
+ if (hss > lvds->native_mode.hdisplay)
+ hss = (10 - 1) * 8;
+
lvds->native_mode.htotal = lvds->native_mode.hdisplay +
(RBIOS16(tmp + 17) - RBIOS16(tmp + 19)) * 8;
lvds->native_mode.hsync_start = lvds->native_mode.hdisplay +
- (RBIOS16(tmp + 21) - RBIOS16(tmp + 19) - 1) * 8;
+ hss;
lvds->native_mode.hsync_end = lvds->native_mode.hsync_start +
(RBIOS8(tmp + 23) * 8);
Patches currently in stable-queue which might be from alexander.deucher@amd.com are
queue-4.1/drm-radeon-combios-add-some-validation-of-lvds-values.patch
queue-4.1/drm-radeon-rework-audio-detect-v4.patch
reply other threads:[~2015-08-10 21:35 UTC|newest]
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