linux-kernel - Re: [PATCH 1/5] drm/amdgpu: Use kmalloc_array() in amdgpu_debugfs_gca_config_read()

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Date:   Mon, 19 Sep 2016 13:25:46 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:     Maling list - DRI developers <dri-devel@...ts.freedesktop.org>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        Chunming Zhou <David1.Zhou@....com>,
        David Airlie <airlied@...ux.ie>, Monk Liu <Monk.Liu@....com>,
        Tom St Denis <tom.stdenis@....com>,
        Julia Lawall <julia.lawall@...6.fr>,
        kernel-janitors@...r.kernel.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/5] drm/amdgpu: Use kmalloc_array() in amdgpu_debugfs_gca_config_read()

On Sun, Sep 18, 2016 at 12:50 PM, SF Markus Elfring
<elfring@...rs.sourceforge.net> wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Sun, 18 Sep 2016 17:00:52 +0200
>
> A multiplication for the size determination of a memory allocation
> indicated that an array data structure should be processed.
> Thus use the corresponding function "kmalloc_array".
>
> This issue was detected by using the Coccinelle software.
>
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>

Applied.  thanks.

> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index df7ab245..2709ebd 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -2438,7 +2438,7 @@ static ssize_t amdgpu_debugfs_gca_config_read(struct file *f, char __user *buf,
>         if (size & 0x3 || *pos & 0x3)
>                 return -EINVAL;
>
> -       config = kmalloc(256 * sizeof(*config), GFP_KERNEL);
> +       config = kmalloc_array(256, sizeof(*config), GFP_KERNEL);
>         if (!config)
>                 return -ENOMEM;
>
> --
> 2.10.0
>
> _______________________________________________
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> dri-devel@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

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