linux-kernel - [PATCH 1/3] drm/amd/display: drop redundant memset() in get_available_dsc

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Date:   Wed, 17 May 2023 14:33:45 -0400
From:   Hamza Mahfooz <hamza.mahfooz@....com>
To:     <amd-gfx@...ts.freedesktop.org>
CC:     Hamza Mahfooz <hamza.mahfooz@....com>,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Harry Wentland <harry.wentland@....com>,
        "Leo Li" <sunpeng.li@....com>,
        Rodrigo Siqueira <Rodrigo.Siqueira@....com>,
        "Alex Deucher" <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Qingqing Zhuo <qingqing.zhuo@....com>,
        Aurabindo Pillai <aurabindo.pillai@....com>,
        "Hans de Goede" <hdegoede@...hat.com>,
        Hersen Wu <hersenxs.wu@....com>,
        Stylon Wang <stylon.wang@....com>, Jun Lei <Jun.Lei@....com>,
        Wenjing Liu <wenjing.liu@....com>,
        Leon Huang <Leon.Huang1@....com>,
        Mike Hsieh <Mike.Hsieh@....com>,
        Cruise Hung <Cruise.Hung@....com>,
        Nasir Osman <nasir.osman@....com>,
        pengfuyuan <pengfuyuan@...inos.cn>,
        <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/3] drm/amd/display: drop redundant memset() in get_available_dsc_slices()

get_available_dsc_slices() returns the number of indices set, and all of
the users of get_available_dsc_slices() don't cross the returned bound
when iterating over available_slices[]. So, the memset() in
get_available_dsc_slices() is redundant and can be dropped.

Fixes: 97bda0322b8a ("drm/amd/display: Add DSC support for Navi (v2)")
Reported-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@....com>
---
 drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c b/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c
index b9a05bb025db..58dd62cce4bb 100644
--- a/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c
+++ b/drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c
@@ -645,8 +645,6 @@ static int get_available_dsc_slices(union dsc_enc_slice_caps slice_caps, int *av
 {
 	int idx = 0;
 
-	memset(available_slices, -1, MIN_AVAILABLE_SLICES_SIZE);
-
 	if (slice_caps.bits.NUM_SLICES_1)
 		available_slices[idx++] = 1;
 
-- 
2.40.1