#1933 HIGH Trial-2: i2c timeout hang after resume

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#1933: i2c timeout hang after resume
--------------------+-------------------------------------------------------
 Reporter:  cjb     |       Owner:  marcelo
     Type:  defect  |      Status:  new    
 Priority:  high    |   Milestone:  Trial-2
Component:  kernel  |     Version:         
 Keywords:          |    Verified:  0      
--------------------+-------------------------------------------------------
 After 660 successful wireless resumes, I got this hang; the i2c loop just
 kept going.  Full log at http://dev.laptop.org/~cjb/nodetach.cap , is too
 large to attach here.

 {{{
 [    7.651818] olpc_do_sleep!
 +r[    0.724957] usb usb1: root hub lost power or was reset
 [    0.966231] usb_reset_device!
 [    1.038542] hub_port_wait_reset: portstatus=503 portchange=10
 [    1.178141] hub_port_wait_reset: portstatus=503 portchange=10
 [    1.288864] old descriptor:
 [    1.304257] bLength: 12
 [    1.319244] bDescriptorType: 1
 [    1.334853] bcdUSB: 200
 [    1.349803] bDeviceClass: 0
 [    1.365120] bDeviceSubClass: 0
 [    1.380709] bDeviceProtocol: 0
 [    1.396299] bMaxPacketSize0: 40
 [    1.412013] idVendor: 1286
 [    1.427236] idProduct: 2001
 [    1.442552] bcdDevice: 3107
 [    1.457868] iManufacturer: 1
 [    1.473275] iProduct: 2
 [    1.488192] iSerialNumber: 0
 [    1.503602] bNumConfigurations: 1
 [    1.519494] new descriptor:
 [    1.534813] bLength: 12
 [    1.549730] bDescriptorType: 1
 [    1.565353] bcdUSB: 200
 [    1.580270] bDeviceClass: 0
 [    1.595588] bDeviceSubClass: 0
 [    1.611209] bDeviceProtocol: 0
 [    1.626830] bMaxPacketSize0: 40
 [    1.642571] idVendor: 1286
 [    1.657797] idProduct: 2001
 [    1.673141] bcdDevice: 3105
 [    1.688428] iManufacturer: 1
 [    1.703834] iProduct: 2
 [    1.718755] iSerialNumber: 0
 [    1.734161] bNumConfigurations: 1
 [    1.750515] USB_REQ_SET_CONFIGURATION!
 [    1.769619] dev->type = c068ae78
 [    1.785544] calling resume directly!
 [    2.058544] i2c-adapter i2c-0: timeout in state address
 [    2.288460] i2c-adapter i2c-0: timeout in state address
 [    2.515456] i2c-adapter i2c-0: timeout in state address
 [    2.744883] i2c-adapter i2c-0: timeout in state address
 [    2.974804] i2c-adapter i2c-0: timeout in state address
 [    3.194963] i2c-adapter i2c-0: timeout in state address
 [    3.415155] i2c-adapter i2c-0: timeout in state address
 [    3.634788] i2c-adapter i2c-0: timeout in state address
 [    3.852015] i2c-adapter i2c-0: timeout in state address
 }}}

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Ticket URL: <http://dev.laptop.org/ticket/1933>
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