linux-kernel - Re: [PATCH 06/10] drivers/input/serio/i8042: Use pr_<level>, pr_fmt. Fix dbg and __FILE_

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Message-ID: <1288141825.4145.83.camel@Joe-Laptop>
Date:	Tue, 26 Oct 2010 18:10:25 -0700
From:	Joe Perches <joe@...ches.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	Jiri Kosina <trivial@...nel.org>,
	"linux-input@...r.kernel.org" <linux-input@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 06/10] drivers/input/serio/i8042: Use pr_<level>,
 pr_fmt. Fix dbg and __FILE__ use

On Tue, 2010-10-26 at 18:00 -0700, Dmitry Torokhov wrote:
> On Oct 26, 2010, at 5:46 PM, Joe Perches <joe@...ches.com> wrote:
> > On Tue, 2010-10-26 at 17:40 -0700, Dmitry Torokhov wrote:
> >>> Mind if I move the time to the front like this?
> >>> +#define dbg(format, arg...)                                            \
> >>> +do {                                    \
> >>> +    if (i8042_debug)                        \
> >>> +        printk(KERN_DEBUG KBUILD_MODNAME ": [%d]" format),    \
> >>> +                      (int)(jiffies - i8042_start_time), ##arg);    \
> >>> +} while (0)
> >> Another option would be to leave '\n' in dbg() and leave most of the
> >> callers as is.
> > That's really error prone though.
> In what way?

$ grep -w dbg drivers/input/serio/i8042.c | cat -n
     1			dbg("%02x <- i8042 (flush, %s)", data,
     2		dbg("%02x -> i8042 (command)", command & 0xff);
     3			dbg("%02x -> i8042 (parameter)", param[i]);
     4				dbg("     -- i8042 (timeout)");
     5				dbg("     -- i8042 (auxerr)");
     6			dbg("%02x <- i8042 (return)", param[i]);
     7			dbg("%02x -> i8042 (kbd-data)", c);
     8				dbg("Extra keyboard ACK - filtered out\n");
     9			dbg("Filtered out by platform filter\n");
    10			if (irq) dbg("Interrupt %d, without any data", irq);
    11				dbg("MUX error, status is %02x, data is %02x", str, data);
    12		dbg("%02x <- i8042 (interrupt, %d, %d%s%s)",
    13			dbg("%02x <- i8042 (aux_test_irq, %s)",
    14			dbg("     -- i8042 (aux irq test timeout)");
    15		dbg("%02x -> i8042 (panic blink)", 0xed);
    16		dbg("%02x -> i8042 (panic blink)", led);

I think 2 defects in 16 uses is a pretty high error rate.


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