From owner-freebsd-stable@FreeBSD.ORG Mon Sep 10 13:38:53 2012 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 06314106566B for ; Mon, 10 Sep 2012 13:38:53 +0000 (UTC) (envelope-from Benjamin.Close@clearchain.com) Received: from mail.clearchain.com (leo.clearchain.com [199.73.29.74]) by mx1.freebsd.org (Postfix) with ESMTP id A69728FC08 for ; Mon, 10 Sep 2012 13:38:51 +0000 (UTC) Received: from pa106-71-128-107.pa.nsw.optusnet.com.au (pa106-71-128-107.pa.nsw.optusnet.com.au [106.71.128.107] (may be forged)) (authenticated bits=0) by mail.clearchain.com (8.14.5/8.14.5) with ESMTP id q8ADcZCM043899 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO) for ; Mon, 10 Sep 2012 23:08:45 +0930 (CST) (envelope-from Benjamin.Close@clearchain.com) Message-ID: <504DED78.2010203@clearchain.com> Date: Mon, 10 Sep 2012 23:09:04 +0930 From: Benjamin Close User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:15.0) Gecko/20120824 Thunderbird/15.0 MIME-Version: 1.0 To: freebsd-stable@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.0.1 (mail.clearchain.com [199.73.29.74]); Mon, 10 Sep 2012 23:08:48 +0930 (CST) Subject: usb port issue in 9.1-Prerelease (Possibly Cam related) X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 10 Sep 2012 13:38:53 -0000 Hi Folks, I've facing an intermittent hang with a USB port which seems cam related: Event's that happen are: o USB modem (HUAWEI E220) plugged into PC ugen3.2: at usbus3 u3g0: <3G Modem> on usbus3 u3g0: Found 3 ports. umass0: on usbus3 umass0: SCSI over Bulk-Only; quirks = 0x0000 umass0:6:0:-1: Attached to scbus6 umass1: on usbus3 umass1: SCSI over Bulk-Only; quirks = 0x0000 umass1:7:1:-1: Attached to scbus7 cd1 at umass-sim0 bus 0 scbus6 target 0 lun 0 cd1: Removable CD-ROM SCSI-2 device cd1: 1.000MB/s transfers cd1: Attempt to query device size failed: NOT READY, Medium not present da0 at umass-sim1 bus 1 scbus7 target 0 lun 0 da0: Removable Direct Access SCSI-2 device da0: 1.000MB/s transfers da0: Attempt to query device size failed: NOT READY, Medium not present o Time Elapses....many packets passed, no da0 or cd1 used. o USB Modem drops off the bus (It does this occasionally as it resets itself) o Causes USB bus to lose devices ugen3.2: at usbus3 (disconnected) u3g0: at uhub3, port 1, addr 2 (disconnected) (cd1:umass-sim0:0:0:0): lost device, 1 refs (cd1:umass-sim0:0:0:0): removing device entry (pass4:umass-sim0:0:0:0): passdevgonecb: devfs entry is gone (da0:umass-sim1:1:0:0): lost device - 0 outstanding, 1 refs (da0:umass-sim1:1:0:0): removing device entry (pass5:umass-sim1:1:0:0): passdevgonecb: devfs entry is gone umass0: at uhub3, port 1, addr 2 (disconnected) At this point that particular USB port is effectively useless. Plugging anything into the ports shows no device showing up. Running usbconfig hangs with: PID TID COMM TDNAME KSTACK 48562 101874 usbconfig - mi_switch+0x186 sleepq_wait+0x42 _sx_xlock_hard+0x426 usbd_enum_lock+0xac usb_ref_device+0x21c usb_open+0xc7 devfs_open+0x197 vn_open_cred+0x2ff kern_openat+0x20a amd64_syscall+0x540 Xfast_syscall+0xf7 Controller is: uhci0@pci0:0:26:0: class=0x0c0300 card=0x02091028 chip=0x28348086 rev=0x02 hdr=0x00 vendor = 'Intel Corporation' device = '82801H (ICH8 Family) USB UHCI Controller' class = serial bus subclass = USB uhci1@pci0:0:26:1: class=0x0c0300 card=0x02091028 chip=0x28358086 rev=0x02 hdr=0x00 vendor = 'Intel Corporation' device = '82801H (ICH8 Family) USB UHCI Controller' class = serial bus subclass = USB ehci0@pci0:0:26:7: class=0x0c0320 card=0x02091028 chip=0x283a8086 rev=0x02 hdr=0x00 vendor = 'Intel Corporation' device = '82801H (ICH8 Family) USB2 EHCI Controller' class = serial bus subclass = USB It does however seem related to cam as looking at the various threads for the usb hub I find: (kgdb) bt #0 sched_switch (td=0xfffffe0002650000, newtd=0xfffffe000227f000, flags=Variable "flags" is not available. ) at /usr/src/sys/kern/sched_ule.c:1927 #1 0xffffffff808f34c6 in mi_switch (flags=260, newtd=0x0) at /usr/src/sys/kern/kern_synch.c:485 #2 0xffffffff8092bfd2 in sleepq_wait (wchan=0xfffffe001ec2a900, pri=92) at /usr/src/sys/kern/subr_sleepqueue.c:623 #3 0xffffffff808f3c69 in _sleep (ident=0xfffffe001ec2a900, lock=0xfffffe00371e9210, priority=Variable "priority" is not available. ) at /usr/src/sys/kern/kern_synch.c:250 #4 0xffffffff802bea02 in cam_sim_free (sim=0xfffffe001ec2a900, free_devq=1) at /usr/src/sys/cam/cam_sim.c:112 #5 0xffffffff8074f8ba in umass_detach (dev=Variable "dev" is not available. ) at /usr/src/sys/dev/usb/storage/umass.c:2183 #6 0xffffffff8091a054 in device_detach (dev=0xfffffe001ec2e900) at device_if.h:214 #7 0xffffffff8075c458 in usb_detach_device (udev=0xfffffe0007ce8800, iface_index=32 ' ', flag=Variable "flag" is not available. ) at /usr/src/sys/dev/usb/usb_device.c:1065 #8 0xffffffff8075c5f4 in usb_unconfigure (udev=0xfffffe0007ce8800, flag=Variable "flag" is not available. ) at /usr/src/sys/dev/usb/usb_device.c:455 #9 0xffffffff8075c88e in usb_free_device (udev=0xfffffe0007ce8800, flag=Variable "flag" is not available. ) at /usr/src/sys/dev/usb/usb_device.c:2093 #10 0xffffffff80764e5e in uhub_explore (udev=0xfffffe0007353800) at /usr/src/sys/dev/usb/usb_hub.c:358 #11 0xffffffff8074f536 in usb_bus_explore (pm=Variable "pm" is not available. ) at /usr/src/sys/dev/usb/controller/usb_controller.c:359 #12 0xffffffff80769173 in usb_process (arg=Variable "arg" is not available. ) at /usr/src/sys/dev/usb/usb_process.c:170 #13 0xffffffff808bc2df in fork_exit (callout=0xffffffff807690a0 , arg=0xffffff80007c0e88, frame=0xffffff804743cc40) at /usr/src/sys/kern/kern_fork.c:992 #14 0xffffffff80bc216e in fork_trampoline () at /usr/src/sys/amd64/amd64/exception.S:602 From: cam_sim_free(struct cam_sim *sim, int free_devq) (kgdb) l 107 { 108 int error; 109 110 sim->refcount--; 111 if (sim->refcount > 0) { 112 error = msleep(sim, sim->mtx, PRIBIO, "simfree", 0); 113 KASSERT(error == 0, ("invalid error value for msleep(9)")); 114 } 115 116 KASSERT(sim->refcount == 0, ("sim->refcount == 0")); It almost appears as if the cam layer is trying to finalise a write of some sort but the physical device has already gone. (kgdb) p sim->refcount $1 = 1 Not sure why refcount is still ==1. The same device in a box running 9.0-Stable (as of about 3 months ago) with a ICH9 controller works as expected. Any suggestions? Cheers, Benjamin