On Wed, 21 Dec 2011, Dmitry Antipov wrote:
> From ac60fe289eef3d81009f2b14a12acbac3e71878b Mon Sep 17 00:00:00 2001
> From: Dmitry Antipov <dmitry.anti...@linaro.org>
> Date: Wed, 21 Dec 2011 11:05:27 +0400
> Subject: [PATCH] ohci-hcd: use usleep_range() instead of mdelay()
>
> ---
> drivers/usb/host/ohci-hcd.c | 4 +++-
> 1 files changed, 3 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
> index b263919..a6d58da 100644
> --- a/drivers/usb/host/ohci-hcd.c
> +++ b/drivers/usb/host/ohci-hcd.c
> @@ -574,6 +574,7 @@ static int ohci_run (struct ohci_hcd *ohci)
> u32 mask, val;
> int first = ohci->fminterval == 0;
> struct usb_hcd *hcd = ohci_to_hcd(ohci);
> + unsigned long usecs;
>
> disable (ohci);
>
> @@ -724,7 +725,8 @@ retry:
> spin_unlock_irq (&ohci->lock);
>
> // POTPGT delay is bits 24-31, in 2 ms units.
> - mdelay ((val >> 23) & 0x1fe);
> + usecs = ((val >> 23) & 0x1fe) * USEC_PER_MSEC;
> + usleep_range(usecs, usecs + 1000);
> hcd->state = HC_STATE_RUNNING;
>
> if (quirk_zfmicro(ohci)) {
Why not simply use msleep()?
Alan Stern
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