1 files changed, 28 insertions, 7 deletions

diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c
index 17e7a9a367e7..728d904c74d7 100644
--- a/drivers/net/wireless/ath/ath9k/hif_usb.c
+++ b/drivers/net/wireless/ath/ath9k/hif_usb.c
@@ -92,10 +92,10 @@ static int hif_usb_send_regout(struct hif_device_usb *hif_dev,
 	cmd->skb = skb;
 	cmd->hif_dev = hif_dev;
 
-	usb_fill_int_urb(urb, hif_dev->udev,
-			 usb_sndintpipe(hif_dev->udev, USB_REG_OUT_PIPE),
+	usb_fill_bulk_urb(urb, hif_dev->udev,
+			 usb_sndbulkpipe(hif_dev->udev, USB_REG_OUT_PIPE),
 			 skb->data, skb->len,
-			 hif_usb_regout_cb, cmd, 1);
+			 hif_usb_regout_cb, cmd);
 
 	usb_anchor_urb(urb, &hif_dev->regout_submitted);
 	ret = usb_submit_urb(urb, GFP_KERNEL);
@@ -541,7 +541,8 @@ static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
 		}
 
 		usb_fill_int_urb(urb, hif_dev->udev,
-				 usb_rcvintpipe(hif_dev->udev, USB_REG_IN_PIPE),
+				 usb_rcvbulkpipe(hif_dev->udev,
+						 USB_REG_IN_PIPE),
 				 nskb->data, MAX_REG_IN_BUF_SIZE,
 				 ath9k_hif_usb_reg_in_cb, nskb, 1);
 
@@ -720,7 +721,8 @@ static int ath9k_hif_usb_alloc_reg_in_urb(struct hif_device_usb *hif_dev)
 		goto err;
 
 	usb_fill_int_urb(hif_dev->reg_in_urb, hif_dev->udev,
-			 usb_rcvintpipe(hif_dev->udev, USB_REG_IN_PIPE),
+			 usb_rcvbulkpipe(hif_dev->udev,
+					 USB_REG_IN_PIPE),
 			 skb->data, MAX_REG_IN_BUF_SIZE,
 			 ath9k_hif_usb_reg_in_cb, skb, 1);
 
@@ -822,7 +824,9 @@ static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev)
 
 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev)
 {
-	int ret;
+	int ret, idx;
+	struct usb_host_interface *alt = &hif_dev->interface->altsetting[0];
+	struct usb_endpoint_descriptor *endp;
 
 	/* Request firmware */
 	ret = request_firmware(&hif_dev->firmware, hif_dev->fw_name,
@@ -850,6 +854,22 @@ static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev)
 		goto err_fw_download;
 	}
 
+	/* On downloading the firmware to the target, the USB descriptor of EP4
+	 * is 'patched' to change the type of the endpoint to Bulk. This will
+	 * bring down CPU usage during the scan period.
+	 */
+	for (idx = 0; idx < alt->desc.bNumEndpoints; idx++) {
+		endp = &alt->endpoint[idx].desc;
+		if (((endp->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK)
+				== 0x04) &&
+		    ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
+				== USB_ENDPOINT_XFER_INT)) {
+			endp->bmAttributes &= ~USB_ENDPOINT_XFERTYPE_MASK;
+			endp->bmAttributes |= USB_ENDPOINT_XFER_BULK;
+			endp->bInterval = 0;
+		}
+	}
+
 	return 0;
 
 err_fw_download:
@@ -920,7 +940,8 @@ static int ath9k_hif_usb_probe(struct usb_interface *interface,
 	}
 
 	ret = ath9k_htc_hw_init(hif_dev->htc_handle,
-				&hif_dev->udev->dev, hif_dev->device_id);
+				&hif_dev->udev->dev, hif_dev->device_id,
+				hif_dev->udev->product);
 	if (ret) {
 		ret = -EINVAL;
 		goto err_htc_hw_init;