tree 1f005c3c25a7d75d2cf4abc01f566efa23f9425a
parent a1028f0abfb321e0f87c10ac0cce8508097c2b42
author Bjørn Mork <bjorn@mork.no> 1343344302 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1344624703 -0700

usb: serial: prevent suspend/resume from racing against probe/remove

Some usb-serial drivers may access port data in their suspend/
resume functions. Such drivers must always verify the validity
of the data as both suspend and resume can be called both before
usb_serial_device_probe and after usb_serial_device_remove.

But the port data may be invalidated during port_probe and
port_remove. This patch prevents the race against suspend and
resume by disabling suspend while port_probe or port_remove is
running.

Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>