linux-kernel - Re: [PATCH v2] Bluetooth: Use kzalloc instead of kmalloc/memset

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Message-ID: <80f39eff-d175-785c-c10f-a31a046ec132@molgen.mpg.de>
Date:   Sun, 30 Oct 2022 11:11:23 +0100
From:   Paul Menzel <pmenzel@...gen.mpg.de>
To:     Kang Minchul <tegongkang@...il.com>
Cc:     Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] Bluetooth: Use kzalloc instead of kmalloc/memset

Dear Kang,


Thank you for the patch.


Am 29.10.22 um 23:40 schrieb Kang Minchul:
> This commit replace kmalloc + memset to kzalloc

replace*s*

(Though starting with “This commit …” is redundant.

> for better code readability and simplicity.
> 
> Following messages are related cocci warnings.

Maybe: This addresse the cocci warning below.

> WARNING: kzalloc should be used for d, instead of kmalloc/memset
> 
> Signed-off-by: Kang Minchul <tegongkang@...il.com>
> ---
> V1 -> V2: Change subject prefix
> 
>   net/bluetooth/hci_conn.c | 6 ++----
>   1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
> index 7a59c4487050..287d313aa312 100644
> --- a/net/bluetooth/hci_conn.c
> +++ b/net/bluetooth/hci_conn.c
> @@ -824,11 +824,10 @@ static int hci_le_terminate_big(struct hci_dev *hdev, u8 big, u8 bis)
>   
>   	bt_dev_dbg(hdev, "big 0x%2.2x bis 0x%2.2x", big, bis);
>   
> -	d = kmalloc(sizeof(*d), GFP_KERNEL);
> +	d = kzalloc(sizeof(*d), GFP_KERNEL);
>   	if (!d)
>   		return -ENOMEM;
>   
> -	memset(d, 0, sizeof(*d));
>   	d->big = big;
>   	d->bis = bis;
>   
> @@ -861,11 +860,10 @@ static int hci_le_big_terminate(struct hci_dev *hdev, u8 big, u16 sync_handle)
>   
>   	bt_dev_dbg(hdev, "big 0x%2.2x sync_handle 0x%4.4x", big, sync_handle);
>   
> -	d = kmalloc(sizeof(*d), GFP_KERNEL);
> +	d = kzalloc(sizeof(*d), GFP_KERNEL);
>   	if (!d)
>   		return -ENOMEM;
>   
> -	memset(d, 0, sizeof(*d));
>   	d->big = big;
>   	d->sync_handle = sync_handle;

Reviewed-by: Paul Menzel <pmenzel@...gen.mpg.de>


Kind regards,

Paul