USB: uas: Use GFP_NOIO instead of GFP_KERNEL in I/O submission path

If swap is on a UAS device, we could recurse into the driver by using
GFP_KERNEL.  Using GFP_NOIO ensures we won't.

Reported-by: James Bottomley <James.Bottomley@suse.de>
Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index 52e5ec1..8d58c63 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -141,7 +141,7 @@
 		struct scsi_pointer *scp = (void *)cmdinfo;
 		struct scsi_cmnd *cmnd = container_of(scp,
 							struct scsi_cmnd, SCp);
-		uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_KERNEL);
+		uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_NOIO);
 	}
 }