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

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Message-ID: <CA+uqrQDukt7u8Nvbn7RK5K+Lw8PoxO769Nf9CF9UbvM2WshXTw@mail.gmail.com>
Date:   Sun, 30 Oct 2022 19:29:13 +0900
From:   Kang Minchul <tegongkang@...il.com>
To:     Paul Menzel <pmenzel@...gen.mpg.de>
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

> 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

Thank you so much for your feedback!
Should I amend the previous commit message and resend PATCH v3?

regards,

Kang Minchul