linux-kernel - Re: [PATCH] drm/amd/pm: use kmemdup() rather than kmalloc+memcpy

Open Source and information security mailing list archives

Date:   Mon, 24 Aug 2020 17:48:02 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     Alex Dewar <alex.dewar90@...il.com>
Cc:     Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, Li Heng <liheng40@...wei.com>,
        Evan Quan <evan.quan@....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() rather than kmalloc+memcpy

Applied.  Thanks!

Alex

On Mon, Aug 24, 2020 at 5:33 PM Alex Dewar <alex.dewar90@...il.com> wrote:
>
> Issue identified with Coccinelle.
>
> Signed-off-by: Alex Dewar <alex.dewar90@...il.com>
> ---
>  .../drm/amd/pm/powerplay/hwmgr/vega20_processpptables.c   | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_processpptables.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_processpptables.c
> index f56a3cbdfa3b..1f9082539457 100644
> --- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_processpptables.c
> +++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_processpptables.c
> @@ -890,14 +890,12 @@ static int init_powerplay_table_information(
>                                 power_saving_clock_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));
>         if (result)
> --
> 2.28.0
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx

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