[PATCH] USB Storage: port reset on transport error

This patch causes a port reset whenever there's a transport error or abort.
If that fails it reverts back to doing a mass-storage device reset.  It
started life as as497 and was rediffed by me.

This makes error recovery a lot quicker and more reliable.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/storage/transport.h

@@ -171,4 +171,5 @@ extern int usb_stor_bulk_transfer_buf(struct us_data *us, unsigned int pipe,
 extern int usb_stor_bulk_transfer_sg(struct us_data *us, unsigned int pipe,
 		void *buf, unsigned int length, int use_sg, int *residual);
 
+extern int usb_stor_port_reset(struct us_data *us);
 #endif