media: ttusb-budget: Remove pci_zalloc_coherent() abuse

Switch to a plain kzalloc() instead of pci_zalloc_coherent() to allocate
memory for the USB DMA.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/media/usb/ttusb-budget/dvb-ttusb-budget.c

@@ -102,7 +102,6 @@ struct ttusb {
 	unsigned int isoc_in_pipe;
 
 	void *iso_buffer;
-	dma_addr_t iso_dma_handle;
 
 	struct urb *iso_urb[ISO_BUF_COUNT];
 
@@ -792,26 +791,17 @@ static void ttusb_free_iso_urbs(struct ttusb *ttusb)
 
 	for (i = 0; i < ISO_BUF_COUNT; i++)
 		usb_free_urb(ttusb->iso_urb[i]);
-
-	pci_free_consistent(NULL,
-			    ISO_FRAME_SIZE * FRAMES_PER_ISO_BUF *
-			    ISO_BUF_COUNT, ttusb->iso_buffer,
-			    ttusb->iso_dma_handle);
+	kfree(ttusb->iso_buffer);
 }
 
 static int ttusb_alloc_iso_urbs(struct ttusb *ttusb)
 {
 	int i;
 
-	ttusb->iso_buffer = pci_zalloc_consistent(NULL,
-						  ISO_FRAME_SIZE * FRAMES_PER_ISO_BUF * ISO_BUF_COUNT,
-						  &ttusb->iso_dma_handle);
-
-	if (!ttusb->iso_buffer) {
-		dprintk("%s: pci_alloc_consistent - not enough memory\n",
-			__func__);
+	ttusb->iso_buffer = kcalloc(FRAMES_PER_ISO_BUF * ISO_BUF_COUNT,
+			ISO_FRAME_SIZE, GFP_KERNEL);
+	if (!ttusb->iso_buffer)
 		return -ENOMEM;
-	}
 
 	for (i = 0; i < ISO_BUF_COUNT; i++) {
 		struct urb *urb;