CVS commit: src/sys/dev/usb

[SAITOH Masanobu]

Module Name:    src
Committed By:   msaitoh
Date:           Thu Nov  9 10:03:47 UTC 2017

Modified Files:
        src/sys/dev/usb: xhci.c

Log Message:
 Wait 1ms first. Existing Intel xHCI requies 1ms delay to prevent system hang
(Errata).

XXX pullup-[78]


To generate a diff of this commit:
cvs rdiff -u -r1.75 -r1.76 src/sys/dev/usb/xhci.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.


Modified files:

Index: src/sys/dev/usb/xhci.c
diff -u src/sys/dev/usb/xhci.c:1.75 src/sys/dev/usb/xhci.c:1.76
--- src/sys/dev/usb/xhci.c:1.75	Sat Oct 28 00:37:13 2017
+++ src/sys/dev/usb/xhci.c	Thu Nov  9 10:03:46 2017
@@ -1,4 +1,4 @@
-/*	$NetBSD: xhci.c,v 1.75 2017/10/28 00:37:13 pgoyette Exp $	*/
+/*	$NetBSD: xhci.c,v 1.76 2017/11/09 10:03:46 msaitoh Exp $	*/
 
 /*
  * Copyright (c) 2013 Jonathan A. Kollasch
@@ -34,7 +34,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: xhci.c,v 1.75 2017/10/28 00:37:13 pgoyette Exp $");
+__KERNEL_RCSID(0, "$NetBSD: xhci.c,v 1.76 2017/11/09 10:03:46 msaitoh Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_usb.h"
@@ -689,10 +689,14 @@ xhci_hc_reset(struct xhci_softc * const 
 	usbcmd = XHCI_CMD_HCRST;
 	xhci_op_write_4(sc, XHCI_USBCMD, usbcmd);
 	for (i = 0; i < XHCI_WAIT_HCRST; i++) {
+		/*
+		 * Wait 1ms first. Existing Intel xHCI requies 1ms delay to
+		 * prevent system hang (Errata).
+		 */
+		usb_delay_ms(&sc->sc_bus, 1);
 		usbcmd = xhci_op_read_4(sc, XHCI_USBCMD);
 		if ((usbcmd & XHCI_CMD_HCRST) == 0)
 			break;
-		usb_delay_ms(&sc->sc_bus, 1);
 	}
 	if (i >= XHCI_WAIT_HCRST) {
 		aprint_error_dev(sc->sc_dev, "host controller reset timeout\n");