Re: [PATCH 6/6] staging: qlge: qlge_ethtool: Remove one byte memset.

[Joe Perches <joe@perches.com>]

On Mon, 2020-07-13 at 17:17 +0300, Dan Carpenter wrote:
> On Mon, Jul 13, 2020 at 05:52:22PM +0530, Suraj Upadhyay wrote:
> > Use direct assignment instead of using memset with just one byte as an
> > argument.
> > Issue found by checkpatch.pl.
> > 
> > Signed-off-by: Suraj Upadhyay <usuraj35@gmail.com>
> > ---
> > Hii Maintainers,
> > 	Please correct me if I am wrong here.
> > ---
> > 
> >  drivers/staging/qlge/qlge_ethtool.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/staging/qlge/qlge_ethtool.c b/drivers/staging/qlge/qlge_ethtool.c
> > index 16fcdefa9687..d44b2dae9213 100644
> > --- a/drivers/staging/qlge/qlge_ethtool.c
> > +++ b/drivers/staging/qlge/qlge_ethtool.c
> > @@ -516,8 +516,8 @@ static void ql_create_lb_frame(struct sk_buff *skb,
> >  	memset(skb->data, 0xFF, frame_size);
> >  	frame_size &= ~1;
> >  	memset(&skb->data[frame_size / 2], 0xAA, frame_size / 2 - 1);
> > -	memset(&skb->data[frame_size / 2 + 10], 0xBE, 1);
> > -	memset(&skb->data[frame_size / 2 + 12], 0xAF, 1);
> > +	skb->data[frame_size / 2 + 10] = (unsigned char)0xBE;
> > +	skb->data[frame_size / 2 + 12] = (unsigned char)0xAF;
> 
> Remove the casting.
> 
> I guess this is better than the original because now it looks like
> ql_check_lb_frame().  It's still really weird looking though.

There are several of these in the intel drivers too:

drivers/net/ethernet/intel/e1000/e1000_ethtool.c:       memset(&skb->data[frame_size / 2 + 10], 0xBE, 1);
drivers/net/ethernet/intel/e1000/e1000_ethtool.c:       memset(&skb->data[frame_size / 2 + 12], 0xAF, 1);
drivers/net/ethernet/intel/e1000e/ethtool.c:    memset(&skb->data[frame_size / 2 + 10], 0xBE, 1);
drivers/net/ethernet/intel/e1000e/ethtool.c:    memset(&skb->data[frame_size / 2 + 12], 0xAF, 1);
drivers/net/ethernet/intel/igb/igb_ethtool.c:   memset(&skb->data[frame_size + 10], 0xBE, 1);
drivers/net/ethernet/intel/igb/igb_ethtool.c:   memset(&skb->data[frame_size + 12], 0xAF, 1);
drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c:       memset(&skb->data[frame_size + 10], 0xBE, 1);
drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c:       memset(&skb->data[frame_size + 12], 0xAF, 1);
drivers/staging/qlge/qlge_ethtool.c:    memset(&skb->data[frame_size / 2 + 10], 0xBE, 1);
drivers/staging/qlge/qlge_ethtool.c:    memset(&skb->data[frame_size / 2 + 12], 0xAF, 1);