This bug has been copied from bug #688926 and has been proposed
to be backported to 5.6 z-stream (EUS).
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.
Technical note added. If any revisions are required, please edit the "Technical Notes" field
accordingly. All revisions will be proofread by the Engineering Content Services team.
This update fixes a bug in the way isochronous input data was returned to user space for usbfs (USB File System) transfers, resolving various audio issues.