[PATCH] USB: ipaq.c bugfixes

This patch fixes several problems in the ipaq.c driver with connecting
and disconnecting pocketpc devices:

* The read urb stayed active if the connect failed, causing nullpointer
  dereferences later on.

* If a write failed, the driver continued as if nothing happened. Now it
  handles that case the same way as other usb serial devices (fix by
  Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br>)

Signed-off-by: Frank Gevaerts <frank.gevaerts@fks.be>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>