linux-kernel - Re: [PATCH net-next] ethernet: ucc_geth: Use kmemdup() rather than kmalloc+memcpy

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Date:   Sun, 23 May 2021 16:26:50 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     YueHaibing <yuehaibing@...wei.com>, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, netdev@...r.kernel.org,
        rasmus.villemoes@...vas.dk, kuba@...nel.org, davem@...emloft.net,
        leoyang.li@....com
Subject: Re: [PATCH net-next] ethernet: ucc_geth: Use kmemdup() rather than
 kmalloc+memcpy

On Sun, May 23, 2021 at 03:29:37PM +0200, Christophe Leroy wrote:
> YueHaibing <yuehaibing@...wei.com> a écrit :
> 
> > Issue identified with Coccinelle.
> > 
> > Signed-off-by: YueHaibing <yuehaibing@...wei.com>
> > ---
> >  drivers/net/ethernet/freescale/ucc_geth.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/net/ethernet/freescale/ucc_geth.c
> > b/drivers/net/ethernet/freescale/ucc_geth.c
> > index e0936510fa34..51206272cc25 100644
> > --- a/drivers/net/ethernet/freescale/ucc_geth.c
> > +++ b/drivers/net/ethernet/freescale/ucc_geth.c
> > @@ -3590,10 +3590,10 @@ static int ucc_geth_probe(struct
> > platform_device* ofdev)
> >  	if ((ucc_num < 0) || (ucc_num > 7))
> >  		return -ENODEV;
> > 
> > -	ug_info = kmalloc(sizeof(*ug_info), GFP_KERNEL);
> > +	ug_info = kmemdup(&ugeth_primary_info, sizeof(*ug_info),
> > +			  GFP_KERNEL);
> 
> Can you keep that as a single line ? The tolerance is 100 chars per line now.

Networking prefers 80. If it fits a single 80 char line, please use a single line.
Otherwise please leave it as it is.

	   Andrew