[Bug 218890] reset SuperSpeed USB device number 2 using xhci_hcd

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=218890

--- Comment #15 from Alan Stern (stern@rowland.harvard.edu) ---
Here's the relevant part of the usbmon trace:

ffff97af45927780 378815216 S Bo:5:004:2 -115 31 = 55534243 08000000 00020000
80000a28 00000000 00000001 0000000 000000
ffff97af45927780 378815233 C Bo:5:004:2 0 31 >
ffff97af4255c900 378815246 S Bi:5:004:1 -115 512 <
ffff97af4255c900 410624206 C Bi:5:004:1 -104 0

There's still a timeout and cancellation, but at least now the number of bytes
transferred is reported as 0 and not 512.  So the patch did fix this bug, but
it didn't prevent the main problem from occurring.

It looks like the main difference between the working and non-working kernels
is that the non-working one issues a READ(10) command (added by Martin
Petersen's commit) whereas the working one uses only READ(16) commands.  I'll
ask Martin about updating his commit to change this.

-- 
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.