linux-kernel - Re: [PATCH 06/14] RFC: usb/host/fotg210: replace msleep by usleep

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Message-ID: <Pine.LNX.4.44L0.1510021349220.1805-100000@iolanthe.rowland.org>
Date:	Fri, 2 Oct 2015 13:52:41 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Felipe Balbi <balbi@...com>
cc:	Peter Senna Tschudin <peter.senna@...il.com>,
	<sergei.shtylyov@...entembedded.com>, <standby24x7@...il.com>,
	<pmladek@...e.cz>, <linux-usb@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <gregkh@...uxfoundation.org>
Subject: Re: [PATCH 06/14] RFC: usb/host/fotg210: replace msleep by usleep_range

On Fri, 2 Oct 2015, Felipe Balbi wrote:

> On Mon, Sep 21, 2015 at 05:01:10PM +0200, Peter Senna Tschudin wrote:
> > msleep under 20ms can result in sleeping up to 20ms, which may not be
> > intended. Replace msleep(5) by usleep_range(5000, 6000).
> > 
> > Signed-off-by: Peter Senna Tschudin <peter.senna@...il.com>
> 
> good catch. I'd apply this straight away. Alan ?

It really doesn't matter.  As long as the delay is at least 5 ms, it
can be arbitrarily long.  This won't hurt, and if it prevents automated
tools from complaining then it's worthwhile.

Peter, a lot of the changes you have been making will also apply to the 
ehci-hcd driver.  Do you want to update it as well?  One caution: The 
style used for continuation lines is to add two extra tab stops, not to 
align things with an open paren on the original line.

Alan Stern

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