linux-kernel - [PATCH] ohci-hcd: ohci-hcd: use usleep

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Date:	Wed, 21 Dec 2011 11:07:22 +0400
From:	Dmitry Antipov <dmitry.antipov@...aro.org>
To:	linaro-dev@...ts.linaro.org
CC:	patches@...aro.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] ohci-hcd: ohci-hcd: use usleep_range() instead of mdelay()

 From ac60fe289eef3d81009f2b14a12acbac3e71878b Mon Sep 17 00:00:00 2001
From: Dmitry Antipov <dmitry.antipov@...aro.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)) {
-- 
1.7.7.4

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