firewire: nosy: Fix dma_free_coherent() size

It looks like the buffer allocated and mapped in add_card() is done
with size RCV_BUFFER_SIZE which is 16 KB and 4KB.

Fixes: 286468210d83 ("firewire: new driver: nosy - IEEE 1394 traffic sniffer")
Co-developed-by: Thomas Fourier <[e-mail]>
Signed-off-by: Thomas Fourier <[e-mail]>
Co-developed-by: Christophe JAILLET <[e-mail]>
Signed-off-by: Christophe JAILLET <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Takashi Sakamoto <[e-mail]>

drivers/firewire/nosy.c

···
 
 static char driver_name[] = KBUILD_MODNAME;
 
+#define RCV_BUFFER_SIZE (16 * 1024)
+
 /* this is the physical layout of a PCL, its size is 128 bytes */
 struct pcl {
 	__le32 next;
···
 			  lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus);
 	dma_free_coherent(&lynx->pci_device->dev, sizeof(struct pcl),
 			  lynx->rcv_pcl, lynx->rcv_pcl_bus);
-	dma_free_coherent(&lynx->pci_device->dev, PAGE_SIZE, lynx->rcv_buffer,
-			  lynx->rcv_buffer_bus);
+	dma_free_coherent(&lynx->pci_device->dev, RCV_BUFFER_SIZE,
+			  lynx->rcv_buffer, lynx->rcv_buffer_bus);
 
 	iounmap(lynx->registers);
 	pci_disable_device(dev);
 	lynx_put(lynx);
 }
-
-#define RCV_BUFFER_SIZE (16 * 1024)
 
 static int
 add_card(struct pci_dev *dev, const struct pci_device_id *unused)
···
 		dma_free_coherent(&lynx->pci_device->dev, sizeof(struct pcl),
 				  lynx->rcv_pcl, lynx->rcv_pcl_bus);
 	if (lynx->rcv_buffer)
-		dma_free_coherent(&lynx->pci_device->dev, PAGE_SIZE,
+		dma_free_coherent(&lynx->pci_device->dev, RCV_BUFFER_SIZE,
 				  lynx->rcv_buffer, lynx->rcv_buffer_bus);
 	iounmap(lynx->registers);