vme: ca91cx42: return error code on DMA error

Signed-off-by: NDmitry Kalinkin <dmitry.kalinkin@gmail.com>
Cc: Igor Alekseev <igor.alekseev@itep.ru>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/vme/bridges/vme_ca91cx42.c

@@ -1269,6 +1269,7 @@ static int ca91cx42_dma_list_exec(struct vme_dma_list *list)
 
 		dev_err(dev, "ca91c042: DMA Error. DGCS=%08X\n", val);
 		val = ioread32(bridge->base + DCTL);
+		retval = -EIO;
 	}
 
 exit: