Bug#649937: usb: timeouts trying to mount thumb drive, "device descriptor read/64, error -60"

[Jonathan Nieder <jrnieder@gmail.com>]

Hi again,

Jonathan Nieder wrote:
> Gabriel VLASIU wrote, using v3.2-rc7:

>> USB drive is recognized only the first time. Does not matter which USB 
>> port I use. See attached file.
[...]
>> usb 1-3: USB disconnect, device number 2
>> usb 3-1: new full-speed USB device number 2 using ohci_hcd
>> usb 3-1: device descriptor read/64, error -73
>> hub 3-0:1.0: unable to enumerate USB device on port 1
[...]
> This is -ETIME.
[...]
>> usb 3-2: new full-speed USB device number 7 using ohci_hcd
>> INFO: task khubd:124 blocked for more than 120 seconds.
>> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
>> khubd           D 00000000100a62b4     0   124      2 0x48000000000
>> Call Trace:
>>  [00000000100a5704] usb_kill_urb+0xac/0xd8 [usbcore]
[...]
>> However, 2.6.32-5-sparc64 behave almost the same.

Ok, we should take this upstream.

Please send a summary of symptoms to sparclinux@vger.kernel.org,
cc-ing linux-usb@vger.kernel.org and either me or this bug log so we
can track it.  Be sure to mention:

 - steps to reproduce the bug
 - symptoms, how they compare to the expected result, and how that
   indicates a bug
 - which kernel versions you have tested, and results for each
 - which USB devices you have tried, and how the results vary with
   choice of gadget, if at all
 - full "dmesg" output from booting an affected kernel and reproducing
   the bug, as an attachment
 - a relevant snippet of "lspci -v" output describing the USB adaptor
 - a link to http://bugs.debian.org/649937 for the full story

Hopefully others on the list can help figure out whether this problem
is hardware-specific and if so, what the relevant variables are, or
if it is a problem with USB support in general on the sparc.  And
maybe to work towards a fix. ;-)

Thanks for your work, and hope that helps,
Jonathan