From 8532467cc9019fdff9d98cfeb68b6c3eb19eadf7 Mon Sep 17 00:00:00 2001
From: Mikita Lipski <mikita.lipski@amd.com>
Date: Wed, 26 Aug 2020 08:00:42 -0400
Subject: [PATCH] drm/amd/display: Set initial value to a divider
[why/how]
Due to compiler optimization the values would be
passed to the division function uninitialized
causing a div by zero. Initialize the numerator
and denominator to 0 and 1 to prevent division
by zero.
Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index b2b6e26f160a9..29bc2874f6a7a 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -2891,8 +2891,8 @@ static struct fixed31_32 get_pbn_per_slot(struct dc_stream_state *stream)
static struct fixed31_32 get_pbn_from_bw_in_kbps(uint64_t kbps)
{
struct fixed31_32 peak_kbps;
- uint32_t numerator;
- uint32_t denominator;
+ uint32_t numerator = 0;
+ uint32_t denominator = 1;
/*
* margin 5300ppm + 300ppm ~ 0.6% as per spec, factor is 1.006
--
2.30.2