linux-kernel - [PATCH 3.10 080/180] drm/radeon: fix firmware info version checks

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Message-Id: <1471793510-13022-81-git-send-email-w@1wt.eu>
Date:   Sun, 21 Aug 2016 17:30:10 +0200
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Alex Deucher <alexander.deucher@....com>, Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 080/180] drm/radeon: fix firmware info version checks

From: Alex Deucher <alexander.deucher@....com>

commit 3edc38a0facef45ee22af8afdce3737f421f36ab upstream.

Some of the checks didn't handle frev 2 tables properly.

Signed-off-by: Alex Deucher <alexander.deucher@....com>
Cc: stable@...r.kernel.org
Signed-off-by: Willy Tarreau <w@....eu>
---
 drivers/gpu/drm/radeon/radeon_atombios.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index f3cce23..f4b9b1c 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -1144,7 +1144,7 @@ bool radeon_atom_get_clock_info(struct drm_device *dev)
 		    le16_to_cpu(firmware_info->info.usReferenceClock);
 		p1pll->reference_div = 0;
 
-		if (crev < 2)
+		if ((frev < 2) && (crev < 2))
 			p1pll->pll_out_min =
 				le16_to_cpu(firmware_info->info.usMinPixelClockPLL_Output);
 		else
@@ -1153,7 +1153,7 @@ bool radeon_atom_get_clock_info(struct drm_device *dev)
 		p1pll->pll_out_max =
 		    le32_to_cpu(firmware_info->info.ulMaxPixelClockPLL_Output);
 
-		if (crev >= 4) {
+		if (((frev < 2) && (crev >= 4)) || (frev >= 2)) {
 			p1pll->lcd_pll_out_min =
 				le16_to_cpu(firmware_info->info_14.usLcdMinPixelClockPLL_Output) * 100;
 			if (p1pll->lcd_pll_out_min == 0)
-- 
2.8.0.rc2.1.gbe9624a