linux-kernel - Re: [PATCH 04/12] hdaps: Correct readout and remove nonsensical attributes

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Date:	Mon, 7 Aug 2006 20:20:47 +0200
From:	Björn Steinbrink <B.Steinbrink@....de>
To:	Shem Multinymous <multinymous@...il.com>
Cc:	Pavel Machek <pavel@...e.cz>, Robert Love <rlove@...ve.org>,
	Jean Delvare <khali@...ux-fr.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	linux-kernel@...r.kernel.org, hdaps-devel@...ts.sourceforge.net
Subject: Re: [PATCH 04/12] hdaps: Correct readout and remove nonsensical attributes

On 2006.08.07 19:30:55 +0300, Shem Multinymous wrote:
> Hi Pavel,
> 
> On 8/7/06, Pavel Machek <pavel@...e.cz> wrote:
> >> +     int total, ret;
> >> +     for (total=READ_TIMEOUT_MSECS; total>0; total-=RETRY_MSECS) {
> >
> >Could we go from 0 to timeout, not the other way around?
> 
> Sure.
> (That's actually vanilla hdapsd code, moved around...)

Maybe you could convert that to sth. like this along the way?

int ret;
unsigned long timeout = jiffies + msec_to_jiffies(READ_TIMEOUT_MSECS);
for (;;) {
	ret = thinkpad_ec_lock();
	if (ret)
		return ret;
	ret = __hdaps_update(0);
	thinkpad_ec_unlock();

	if (ret != -EBUSY)
		return ret;
	if (time_after(timeout, jiffies))
		break;
	msleep(RETRY_MSECS);
}
return ret;

Rationale: http://lkml.org/lkml/2005/7/14/133 - it's also listed on the
kerneljanitors todo list.

Regards
Björn
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