spi/bfin_spi: return immediately after skipping to next transfer

If there is an error with setting up a transfer, we need to return
immediately rather than trying to continue to process things.  We
already set up the error states for the caller at this point.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

drivers/spi/spi_bfin5xx.c

@@ -653,6 +653,7 @@ static void bfin_spi_pump_transfers(unsigned long data)
 		message->state = bfin_spi_next_transfer(drv_data);
 		/* Schedule next transfer tasklet */
 		tasklet_schedule(&drv_data->pump_transfers);
+		return;
 	}
 
 	if (transfer->tx_buf != NULL) {