tree b01707d2e0901665f20bae0f0c5a0930af69651a
parent 09091a4d5f2dd378dcf71de50b48cdacc58a8ac0
author Alan Stern <stern@rowland.harvard.edu> 1335203676 -0400
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1335207944 -0700

EHCI: maintain the ehci->command value properly

The ehci-hcd driver is a little haphazard about keeping track of the
state of the USBCMD register.  The ehci->command field is supposed to
hold the register's value (apart from a few special bits) at all
times, but it isn't maintained properly.

This patch (as1543) cleans up the situation.  It keeps ehci->command
up-to-date, and uses that value rather than reading the register from
the hardware whenever possible.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>