linux-kernel - Re: [PATCH] drivers/net: appletalk/cops: remove redundant if statement and mask

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Message-Id: <20181224.100836.117884501889550887.davem@davemloft.net>
Date:   Mon, 24 Dec 2018 10:08:36 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     colin.king@...onical.com
Cc:     netdev@...r.kernel.org, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers/net: appletalk/cops: remove redundant if
 statement and mask

From: Colin King <colin.king@...onical.com>
Date: Sat, 22 Dec 2018 16:58:41 +0000

> @@ -777,10 +777,7 @@ static void cops_rx(struct net_device *dev)
>          }
>  
>          /* Get response length. */
> -	if(lp->board==DAYNA)
> -        	pkt_len = inb(ioaddr) & 0xFF;
> -	else
> -		pkt_len = inb(ioaddr) & 0x00FF;
> +	pkt_len = inb(ioaddr);

There are other instances of similar weird identical statements guarded
by the test on the board type being DAYNA.

For example, in cops_send_packet():

	if(lp->board == DAYNA)
               	outb(skb->len >> 8, ioaddr);
	else
		outb((skb->len >> 8)&0x0FF, ioaddr);

Could you scan the rest of the driver and deal with all of these
instances in one go?

Thank you!