[src/trunk]: src/sys/dev/usb When a child device is detached and no interface...

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

details:   https://anonhg.NetBSD.org/src/rev/61c93a719dfb
branches:  trunk
changeset: 765522:61c93a719dfb
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sun May 29 12:37:09 2011 +0000

description:
When a child device is detached and no interfaces are claimed by drivers,
free the port's subdevice list. This allows for detaching a driver from
a USB device and loading a different one without disconnecting the device.

diffstat:

 sys/dev/usb/uhub.c |  9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diffs (30 lines):

diff -r b95a9fa60015 -r 61c93a719dfb sys/dev/usb/uhub.c
--- a/sys/dev/usb/uhub.c        Sun May 29 10:29:01 2011 +0000
+++ b/sys/dev/usb/uhub.c        Sun May 29 12:37:09 2011 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uhub.c,v 1.112 2010/11/03 22:59:40 dyoung Exp $        */
+/*     $NetBSD: uhub.c,v 1.113 2011/05/29 12:37:09 jmcneill Exp $      */
 /*     $FreeBSD: src/sys/dev/usb/uhub.c,v 1.18 1999/11/17 22:33:43 n_hibma Exp $       */
 
 /*
@@ -36,7 +36,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uhub.c,v 1.112 2010/11/03 22:59:40 dyoung Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uhub.c,v 1.113 2011/05/29 12:37:09 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -663,6 +663,11 @@
                                dev->nifaces_claimed--;
                        }
                }
+               if (dev->nifaces_claimed == 0) {
+                       free(dev->subdevs, M_USB);
+                       dev->subdevs = NULL;
+                       dev->subdevlen = 0;
+               }
        }
 }