tree a769ff8a82367c8767d03c733278a078536e0945
parent 65605ae8e587d714f73e674369bc4cd5a1e53a9b
author Alan Stern <stern@rowland.harvard.edu> 1218566039 -0400
committer Greg Kroah-Hartman <gregkh@suse.de> 1219339596 -0700

USB: Defer Set-Interface for suspended devices

This patch (as1128) fixes one of the problems related to the new PM
infrastructure.  We are not allowed to register new child devices
during the middle of a system sleep transition, but unbinding a USB
driver causes the core to automatically install altsetting 0 and
thereby create new endpoint pseudo-devices.

The patch fixes this problem (and the related problem that installing
altsetting 0 will fail if the device is suspended) by deferring the
Set-Interface call until some later time when it is legal and can
succeed.  Possible later times are: when a new driver is being probed
for the interface, and when the interface is being resumed.

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