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

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Date:	Fri, 2 Oct 2015 12:31:13 -0500
From:	Felipe Balbi <balbi@...com>
To:	Peter Senna Tschudin <peter.senna@...il.com>
CC:	<balbi@...com>, <stern@...land.harvard.edu>,
	<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 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 ?

> ---
>  drivers/usb/host/fotg210-hcd.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/host/fotg210-hcd.c b/drivers/usb/host/fotg210-hcd.c
> index e7e9991..55c2279 100644
> --- a/drivers/usb/host/fotg210-hcd.c
> +++ b/drivers/usb/host/fotg210-hcd.c
> @@ -5122,7 +5122,7 @@ static int fotg210_run(struct usb_hcd *hcd)
>  	fotg210->rh_state = FOTG210_RH_RUNNING;
>  	/* unblock posted writes */
>  	fotg210_readl(fotg210, &fotg210->regs->command);
> -	msleep(5);
> +	usleep_range(5000, 6000);
>  	up_write(&ehci_cf_port_reset_rwsem);
>  	fotg210->last_periodic_enable = ktime_get_real();
>  
> -- 
> 2.1.0
> 

-- 
balbi

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