Hi,
It seems there's a problem with USB OHCI driver that causes these traces to
appear on suspend on an AMD64-based box:
..<7>PM: Image restored successfully.
PCI: Setting latency timer of device 0000:00:02.0 to 64
ohci_hcd 0000:00:02.0: HC died; cleaning up
usb 1-2: USB disconnect, address 3
Badness in hcd_endpoint_disable at drivers/usb/core/hcd.c:1310
Call Trace:<7>Losing some ticks... checking if CPU frequency changed.
<ffffffff803455fb>{hcd_endpoint_disable+107}
<ffffffff80346729>{usb_disable_endpoint+41}
<ffffffff803468aa>{usb_disable_device+26}
<ffffffff803422fc>{usb_disconnect+188}
<ffffffff803441b0>{hcd_panic+0} <ffffffff803441fa>{hcd_panic+74}
<ffffffff8015824d>{worker_thread+733}
<ffffffff80137c00>{default_wake_function+0}
<ffffffff80137c00>{default_wake_function+0}
<ffffffff80157f70>{worker_thread+0}
<ffffffff8015f51d>{kthread+205} <ffffffff80111b43>{child_rip+8}
<ffffffff8015f450>{kthread+0} <ffffffff80111b3b>{child_rip+0}
[-- several times the above --]
Call Trace:<ffffffff80345c3e>{hcd_unlink_urb+494}
<ffffffff803463dc>{usb_kill_urb+380}
<ffffffff80345a37>{hcd_endpoint_disable+1191}
<ffffffff8019ed6e>{invalidate_inode_buffers+14}
<ffffffff80346729>{usb_disable_endpoint+41}
<ffffffffa022374c>{:usbhid:hid_disconnect+44}
<ffffffff8033f4e9>{usb_unbind_interface+73}
<ffffffff8030b95e>{device_release_driver+94}
<ffffffff8030baf4>{bus_remove_device+164}
<ffffffff8030a898>{device_del+88}
<ffffffff8034690b>{usb_disable_device+123}
<ffffffff803422fc>{usb_disconnect+188}
<ffffffff803441b0>{hcd_panic+0} <ffffffff803441fa>{hcd_panic+74}
<ffffffff8015824d>{worker_thread+733}
<ffffffff80137c00>{default_wake_function+0}
<ffffffff80137c00>{default_wake_function+0}
<ffffffff80157f70>{worker_thread+0}
<ffffffff8015f51d>{kthread+205} <ffffffff80111b43>{child_rip+8}
<ffffffff8015f450>{kthread+0} <ffffffff80111b3b>{child_rip+0}
[-- once again the above --]
The workaround is to explicitly unload the driver before suspend and reload it
after resume. It is possible that it's fixed in -mm kernels, as I haven't
seen such symptoms there, recently (since 2.6.9-rc2-mm1 at least).
Greets,
RJW
--
- Would you tell me, please, which way I ought to go from here?
- That depends a good deal on where you want to get to.
-- Lewis Carroll "Alice's Adventures in Wonderland"
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