linux-kernel - Re: [PATCH] drm/amd/pm: Use kmemdup instead of kmalloc and memcpy

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Message-ID: <CADnq5_NcF1-mmGQAuGjOE65wvjmxwZSRqovi2M5Kp6-gic-BZQ@mail.gmail.com>
Date:   Tue, 10 Nov 2020 12:08:08 -0500
From:   Alex Deucher <alexdeucher@...il.com>
To:     Tian Tao <tiantao6@...ilicon.com>
Cc:     "Quan, Evan" <evan.quan@....com>,
        "Deucher, Alexander" <alexander.deucher@....com>,
        Christian Koenig <christian.koenig@....com>,
        Dave Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Alex Dewar <alex.dewar90@...il.com>,
        Nirmoy Das <nirmoy.das@....com>,
        amd-gfx list <amd-gfx@...ts.freedesktop.org>,
        Maling list - DRI developers 
        <dri-devel@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/amd/pm: Use kmemdup instead of kmalloc and memcpy

On Tue, Nov 10, 2020 at 11:57 AM Tian Tao <tiantao6@...ilicon.com> wrote:
>
> Fixes coccicheck warning:
> drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega12_processpptables.c:255:
> 36-43: WARNING opportunity for kmemdup
>
> Signed-off-by: Tian Tao <tiantao6@...ilicon.com>

Applied.  Thanks!

Alex

> ---
>  drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega12_processpptables.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega12_processpptables.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega12_processpptables.c
> index 740e2fc..1e79baa 100644
> --- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega12_processpptables.c
> +++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega12_processpptables.c
> @@ -252,12 +252,11 @@ static int init_powerplay_table_information(
>         phm_copy_clock_limits_array(hwmgr, &pptable_information->power_saving_clock_max, powerplay_table->PowerSavingClockMax, ATOM_VEGA12_PPCLOCK_COUNT);
>         phm_copy_clock_limits_array(hwmgr, &pptable_information->power_saving_clock_min, powerplay_table->PowerSavingClockMin, ATOM_VEGA12_PPCLOCK_COUNT);
>
> -       pptable_information->smc_pptable = kmalloc(sizeof(PPTable_t), GFP_KERNEL);
> +       pptable_information->smc_pptable = kmemdup(&(powerplay_table->smcPPTable),
> +                                                  sizeof(PPTable_t), GFP_KERNEL);
>         if (pptable_information->smc_pptable == NULL)
>                 return -ENOMEM;
>
> -       memcpy(pptable_information->smc_pptable, &(powerplay_table->smcPPTable), sizeof(PPTable_t));
> -
>         result = append_vbios_pptable(hwmgr, (pptable_information->smc_pptable));
>
>         return result;
> --
> 2.7.4
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx

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