USB: EHCI: defer reclamation of siTDs

USB: EHCI: defer reclamation of siTDs

commit 0e5f231bc16ff9910882fa5b9d64d80e7691cfab upstream.

This patch (as1369) fixes a problem in ehci-hcd.  Some controllers
occasionally run into trouble when the driver reclaims siTDs too
quickly.  This can happen while streaming audio; it causes the
controller to crash.

The patch changes siTD reclamation to work the same way as iTD
reclamation: Completed siTDs are stored on a list and not reused until
at least one frame has passed.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Nate Case <ncase@xes-inc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>