The following reply was made to PR kern/163091; it has been noted by GNATS.
From: dfil...@freebsd.org (dfilter service) To: bug-follo...@freebsd.org Cc: Subject: Re: kern/163091: commit references a PR Date: Wed, 21 Dec 2011 08:46:17 +0000 (UTC) Author: hselasky Date: Wed Dec 21 08:46:08 2011 New Revision: 228758 URL: http://svn.freebsd.org/changeset/base/228758 Log: Fix for race against user-space applications trying to change the configuration on USB HUBs. PR: kern/163091 MFC after: 1 week Modified: head/sys/dev/usb/usb_hub.c Modified: head/sys/dev/usb/usb_hub.c ============================================================================== --- head/sys/dev/usb/usb_hub.c Wed Dec 21 02:45:51 2011 (r228757) +++ head/sys/dev/usb/usb_hub.c Wed Dec 21 08:46:08 2011 (r228758) @@ -707,6 +707,13 @@ uhub_explore(struct usb_device *udev) DPRINTF("Device is suspended!\n"); return (0); } + + /* + * Make sure we don't race against user-space applications + * like LibUSB: + */ + usbd_enum_lock(udev); + for (x = 0; x != hub->nports; x++) { up = hub->ports + x; portno = x + 1; @@ -784,6 +791,8 @@ uhub_explore(struct usb_device *udev) up->restartcnt = 0; } + usbd_enum_unlock(udev); + /* initial status checked */ sc->sc_flags |= UHUB_FLAG_DID_EXPLORE; _______________________________________________ svn-src-...@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org" _______________________________________________ freebsd-usb@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-usb To unsubscribe, send any mail to "freebsd-usb-unsubscr...@freebsd.org"
