From: Venki Pallipadi <venkatesh.pallipadi@intel.com>
Date: Mon, 9 Jul 2007 19:03:06 +0000 (-0700)
Subject: USB: Make usb-autosuspend timer 1 sec jiffy aligned
X-Git-Tag: v2.6.23-rc1~1083^2~23
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8d6d5fd05088c023bb8b22a4bd0067c21f9c5f18;p=linux-2.6

USB: Make usb-autosuspend timer 1 sec jiffy aligned

Make usb autosuspend timers 1sec jiffy aligned.

This helps to reduce the frequency at which the CPU must be taken out of a
lower-power state.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index a3aed8d87d..73c49362cd 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -1010,7 +1010,7 @@ static int autosuspend_check(struct usb_device *udev)
 			 * or for the past.
 			 */
 			queue_delayed_work(ksuspend_usb_wq, &udev->autosuspend,
-					suspend_time - jiffies);
+				round_jiffies_relative(suspend_time - jiffies));
 			}
 		return -EAGAIN;
 	}