--- a/drivers/net/wireless/b43/Makefile
+++ b/drivers/net/wireless/b43/Makefile
@@ -19,7 +19,7 @@ b43-y				+= xmit.o
 b43-y				+= lo.o
 b43-y				+= wa.o
 b43-y				+= dma.o
-b43-y				+= pio.o
+b43-$(CONFIG_B43_PIO)		+= pio.o
 b43-y				+= rfkill.o
 b43-$(CONFIG_B43_LEDS)		+= leds.o
 b43-$(CONFIG_B43_PCMCIA)	+= pcmcia.o
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -1883,9 +1883,11 @@ static void b43_do_interrupt_thread(stru
 			       dma_reason[4], dma_reason[5]);
 			b43err(dev->wl, "This device does not support DMA "
 			       "on your system. It will now be switched to PIO.\n");
+#ifdef CONFIG_B43_PIO
 			/* Fall back to PIO transfers if we get fatal DMA errors! */
 			dev->use_pio = 1;
 			b43_controller_restart(dev, "DMA error");
+#endif
 			return;
 		}
 		if (merged_dma_reason & B43_DMAIRQ_NONFATALMASK) {
--- a/drivers/net/wireless/b43/pio.h
+++ b/drivers/net/wireless/b43/pio.h
@@ -150,7 +150,7 @@ static inline void b43_piorx_write32(str
 	b43_write32(q->dev, q->mmio_base + offset, value);
 }
 
-
+#ifdef CONFIG_B43_PIO
 int b43_pio_init(struct b43_wldev *dev);
 void b43_pio_free(struct b43_wldev *dev);
 
@@ -161,5 +161,37 @@ void b43_pio_rx(struct b43_pio_rxqueue *
 
 void b43_pio_tx_suspend(struct b43_wldev *dev);
 void b43_pio_tx_resume(struct b43_wldev *dev);
+#else
+static inline int b43_pio_init(struct b43_wldev *dev)
+{
+	return 0;
+}
+
+static inline void b43_pio_free(struct b43_wldev *dev)
+{
+}
+
+static inline int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb)
+{
+	return 0;
+}
+
+static inline void b43_pio_handle_txstatus(struct b43_wldev *dev,
+					   const struct b43_txstatus *status)
+{
+}
+
+static inline void b43_pio_rx(struct b43_pio_rxqueue *q)
+{
+}
+
+static inline void b43_pio_tx_suspend(struct b43_wldev *dev)
+{
+}
+
+static inline void b43_pio_tx_resume(struct b43_wldev *dev)
+{
+}
+#endif /* CONFIG_B43_PIO */
 
 #endif /* B43_PIO_H_ */