netdev - Re: [PATCH] isdn: hisax: Fix misuse of %x in config.c

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Message-ID: <20190422202327.77a97643@hermes.lan>
Date:   Mon, 22 Apr 2019 20:24:01 -0700
From:   Stephen Hemminger <stephen.hemminger@...il.com>
To:     Fuqian Huang <huangfq.daxian@...il.com>
Cc:     Karsten Keil <isdn@...ux-pingi.de>, netdev@...r.kernel.org
Subject: Re: [PATCH] isdn: hisax: Fix misuse of %x in config.c

On Tue, 23 Apr 2019 10:25:28 +0800
Fuqian Huang <huangfq.daxian@...il.com> wrote:

> Pointers should be printed with %p or %px rather than
> cast to (u_long) type and printed with %lX.
> As the function seems to be for debug purpose.
> Change %lX to %px to print the pointer value.
> 
> Signed-off-by: Fuqian Huang <huangfq.daxian@...il.com>
> ---
>  drivers/isdn/hisax/config.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/isdn/hisax/config.c b/drivers/isdn/hisax/config.c
> index b12e6ca..de96511 100644
> --- a/drivers/isdn/hisax/config.c
> +++ b/drivers/isdn/hisax/config.c
> @@ -1294,9 +1294,9 @@ void HiSax_reportcard(int cardnr, int sel)
>  	printk(KERN_DEBUG "HiSax: reportcard No %d\n", cardnr + 1);
>  	printk(KERN_DEBUG "HiSax: Type %s\n", CardType[cs->typ]);
>  	printk(KERN_DEBUG "HiSax: debuglevel %x\n", cs->debug);
> -	printk(KERN_DEBUG "HiSax: HiSax_reportcard address 0x%lX\n",
> -	       (ulong) & HiSax_reportcard);
> -	printk(KERN_DEBUG "HiSax: cs 0x%lX\n", (ulong) cs);
> +	printk(KERN_DEBUG "HiSax: HiSax_reportcard address 0x%px\n",
> +		HiSax_reportcard);
> +	printk(KERN_DEBUG "HiSax: cs 0x%px\n", cs);
>  	printk(KERN_DEBUG "HiSax: HW_Flags %lx bc0 flg %lx bc1 flg %lx\n",
>  	       cs->HW_Flags, cs->bcs[0].Flag, cs->bcs[1].Flag);
>  	printk(KERN_DEBUG "HiSax: bcs 0 mode %d ch%d\n",

Why not just remove the useless prints. There is no context where
a pointer has any meaning in userspace.  Then again most of ISDN
should probably go to staging anyway....