linux-kernel - linux-6.6-rc1/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c:2175:26: style: Array index 'i' is used before limits check. [arrayIndexThenCheck]

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Date:   Mon, 11 Sep 2023 16:01:43 +0000
From:   David Binderman <dcb314@...mail.com>
To:     "harry.wentland@....com" <harry.wentland@....com>,
        "sunpeng.li@....com" <sunpeng.li@....com>,
        "Rodrigo.Siqueira@....com" <Rodrigo.Siqueira@....com>,
        "alexander.deucher@....com" <alexander.deucher@....com>,
        "christian.koenig@....com" <christian.koenig@....com>,
        "Xinhui.Pan@....com" <Xinhui.Pan@....com>,
        "airlied@...il.com" <airlied@...il.com>,
        "daniel@...ll.ch" <daniel@...ll.ch>,
        "amd-gfx@...ts.freedesktop.org" <amd-gfx@...ts.freedesktop.org>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: linux-6.6-rc1/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c:2175:26:
 style: Array index 'i' is used before limits check. [arrayIndexThenCheck]

Hello there,

Static analyser cppcheck noticed the above problem. Source code is

            if (dcfclk_sta_targets[i] < optimal_dcfclk_for_uclk[j] && i < num_dcfclk_sta_targets) {

Suggest new code:

            if (i < num_dcfclk_sta_targets && dcfclk_sta_targets[i] < optimal_dcfclk_for_uclk[j]) {

Regards

David Binderman