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Message-Id: <20210715182615.014284699@linuxfoundation.org>
Date: Thu, 15 Jul 2021 20:36:01 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Chris Park <Chris.Park@....com>,
Nicholas Kazlauskas <Nicholas.Kazlauskas@....com>,
Wayne Lin <waynelin@....com>,
Daniel Wheeler <daniel.wheeler@....com>,
Alex Deucher <alexander.deucher@....com>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.13 006/266] drm/amd/display: Fix BSOD with NULL check
From: Chris Park <Chris.Park@....com>
[ Upstream commit b2d4b9f72fb14c1e6e4f0128964a84539a72d831 ]
[Why]
CLK mgr is null for server settings.
[How]
Guard the function with NULL check.
Signed-off-by: Chris Park <Chris.Park@....com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@....com>
Acked-by: Wayne Lin <waynelin@....com>
Tested-by: Daniel Wheeler <daniel.wheeler@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/gpu/drm/amd/display/dc/core/dc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c b/drivers/gpu/drm/amd/display/dc/core/dc.c
index e57df2f6f824..a869702d77af 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -3274,7 +3274,7 @@ void dc_allow_idle_optimizations(struct dc *dc, bool allow)
if (dc->debug.disable_idle_power_optimizations)
return;
- if (dc->clk_mgr->funcs->is_smu_present)
+ if (dc->clk_mgr != NULL && dc->clk_mgr->funcs->is_smu_present)
if (!dc->clk_mgr->funcs->is_smu_present(dc->clk_mgr))
return;
--
2.30.2
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