usb-storage: always set the allow_restart flag

This patch (as1000) sets the SCSI allow_restart flag for USB disk
devices. In theory this should never hurt, and there definitely are
devices out there (such as the Seagate 250-GB external drive) which
need the flag to be set.

Signed-off-by: Mauro Carvalho Chehab <[e-mail]>
Signed-off-by: Alan Stern <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/storage/scsiglue.c

···
 		 * is an occasional series of retries that will all fail. */
 		sdev->retry_hwerror = 1;
 
+		/* USB disks should allow restart.  Some drives spin down
+		 * automatically, requiring a START-STOP UNIT command. */
+		sdev->allow_restart = 1;
+
 	} else {
 
 		/* Non-disk-type devices don't need to blacklist any pages