linux-kernel - ohci : strange looking use of round_jiffies

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Message-Id: <1206542289.2931.17.camel@castor.localdomain>
Date:	Wed, 26 Mar 2008 14:38:09 +0000
From:	Richard Kennedy <richard@....demon.co.uk>
To:	dbrownell@...rs.sourceforge.net
Cc:	linux-usb <linux-usb@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>
Subject: ohci : strange looking use of round_jiffies_relative. possible bug
	?

I was looking at the uses of round_jiffies and noticed that the ohci
unlink_watchdog_func() calls 
mod_timer(&ohci->unlink_watchdog, round_jiffies_relative(HZ));

Which looks a bit strange as it will set the timer to 0 <= t < HZ.
Reading the comments I think that is really is expecting to setup timer
to (now + 1s)

mod_timer(&ohci->unlink_watchdog, round_jiffies(jiffies + HZ));

If this is not true then perhaps it needs a comment to explain what it
_is_ trying to do, because it's got me baffled ;)


Cheers
Richard



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