[src/trunk]: src/sys/external/bsd/dwc2 In msleep use udelay if cold or sleep ...

[skrll <skrll%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/fb85a5409b92
branches:  trunk
changeset: 343665:fb85a5409b92
user:      skrll <skrll%NetBSD.org@localhost>
date:      Fri Feb 19 21:10:18 2016 +0000

description:
In msleep use udelay if cold or sleep is small enough.  This is mostly
copied from the drm2 version.

diffstat:

 sys/external/bsd/dwc2/dwc2.h |  11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)

diffs (26 lines):

diff -r 9172af3ca4be -r fb85a5409b92 sys/external/bsd/dwc2/dwc2.h
--- a/sys/external/bsd/dwc2/dwc2.h      Fri Feb 19 21:08:19 2016 +0000
+++ b/sys/external/bsd/dwc2/dwc2.h      Fri Feb 19 21:10:18 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: dwc2.h,v 1.7 2015/08/30 13:02:42 skrll Exp $   */
+/*     $NetBSD: dwc2.h,v 1.8 2016/02/19 21:10:18 skrll Exp $   */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -260,10 +260,13 @@
 }
 
 static inline void
-msleep(unsigned int msecs)
+msleep(unsigned int msec)
 {
-
-       kpause("mdelay", false, mstohz(msecs), NULL);
+       if (cold ||
+           ((hz < 1000) && (msec < (1000/hz))))
+               udelay(msec * 1000);
+       else
+               (void)kpause("mdelay", false, mstohz(msec), NULL);
 }
 
 #define        EREMOTEIO       EIO