[v1,11/11] usbnet: smsc95xx: apply introduced usb command APIs

diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index 7479a57..1730f75 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -65,11 +65,6 @@  struct smsc95xx_priv {
 	spinlock_t mac_cr_lock;
 };
 
-struct usb_context {
-	struct usb_ctrlrequest req;
-	struct usbnet *dev;
-};
-
 static bool turbo_mode = true;
 module_param(turbo_mode, bool, 0644);
 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
@@ -77,25 +72,20 @@  MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
 					  u32 *data)
 {
-	u32 *buf = kmalloc(4, GFP_KERNEL);
+	u32 buf;
 	int ret;
 
 	BUG_ON(!dev);
 
-	if (!buf)
-		return -ENOMEM;
-
-	ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
-		USB_VENDOR_REQUEST_READ_REGISTER,
-		USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
-		00, index, buf, 4, USB_CTRL_GET_TIMEOUT);
-
+	ret = usbnet_read_cmd(dev, USB_VENDOR_REQUEST_READ_REGISTER,
+			      USB_DIR_IN | USB_TYPE_VENDOR |
+			      USB_RECIP_DEVICE,
+			      0, index, &buf, 4);
 	if (unlikely(ret < 0))
 		netdev_warn(dev->net, "Failed to read register index 0x%08x\n", index);
 
-	le32_to_cpus(buf);
-	*data = *buf;
-	kfree(buf);
+	le32_to_cpus(&buf);
+	*data = buf;
 
 	return ret;
 }
@@ -103,27 +93,22 @@  static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
 					   u32 data)
 {
-	u32 *buf = kmalloc(4, GFP_KERNEL);
+	u32 buf;
 	int ret;
 
 	BUG_ON(!dev);
 
-	if (!buf)
-		return -ENOMEM;
-
-	*buf = data;
-	cpu_to_le32s(buf);
+	buf = data;
+	cpu_to_le32s(&buf);
 
-	ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
-		USB_VENDOR_REQUEST_WRITE_REGISTER,
-		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
-		00, index, buf, 4, USB_CTRL_SET_TIMEOUT);
 
+	ret = usbnet_write_cmd(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
+			       USB_DIR_OUT | USB_TYPE_VENDOR |
+			       USB_RECIP_DEVICE,
+			       0, index, &buf, 4);
 	if (unlikely(ret < 0))
 		netdev_warn(dev->net, "Failed to write register index 0x%08x\n", index);
 
-	kfree(buf);
-
 	return ret;
 }
 
@@ -132,11 +117,8 @@  static int smsc95xx_set_feature(struct usbnet *dev, u32 feature)
 	if (WARN_ON_ONCE(!dev))
 		return -EINVAL;
 
-	cpu_to_le32s(&feature);
-
-	return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
-		USB_REQ_SET_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
-		USB_CTRL_SET_TIMEOUT);
+	return usbnet_write_cmd(dev, USB_REQ_SET_FEATURE,
+				USB_RECIP_DEVICE, feature, 0, NULL, 0);
 }
 
 static int smsc95xx_clear_feature(struct usbnet *dev, u32 feature)
@@ -144,11 +126,8 @@  static int smsc95xx_clear_feature(struct usbnet *dev, u32 feature)
 	if (WARN_ON_ONCE(!dev))
 		return -EINVAL;
 
-	cpu_to_le32s(&feature);
-
-	return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
-		USB_REQ_CLEAR_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
-		USB_CTRL_SET_TIMEOUT);
+	return usbnet_write_cmd(dev, USB_REQ_CLEAR_FEATURE,
+				USB_RECIP_DEVICE, feature, 0, NULL, 0);
 }
 
 /* Loop until the read is completed with timeout
@@ -350,60 +329,20 @@  static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 	return 0;
 }
 
-static void smsc95xx_async_cmd_callback(struct urb *urb)
-{
-	struct usb_context *usb_context = urb->context;
-	struct usbnet *dev = usb_context->dev;
-	int status = urb->status;
-
-	check_warn(status, "async callback failed with %d\n", status);
-
-	kfree(usb_context);
-	usb_free_urb(urb);
-}
-
 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
 						 u32 *data)
 {
-	struct usb_context *usb_context;
-	int status;
-	struct urb *urb;
 	const u16 size = 4;
+	int ret;
 
-	urb = usb_alloc_urb(0, GFP_ATOMIC);
-	if (!urb) {
-		netdev_warn(dev->net, "Error allocating URB\n");
-		return -ENOMEM;
-	}
-
-	usb_context = kmalloc(sizeof(struct usb_context), GFP_ATOMIC);
-	if (usb_context == NULL) {
-		netdev_warn(dev->net, "Error allocating control msg\n");
-		usb_free_urb(urb);
-		return -ENOMEM;
-	}
-
-	usb_context->req.bRequestType =
-		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
-	usb_context->req.bRequest = USB_VENDOR_REQUEST_WRITE_REGISTER;
-	usb_context->req.wValue = 00;
-	usb_context->req.wIndex = cpu_to_le16(index);
-	usb_context->req.wLength = cpu_to_le16(size);
-
-	usb_fill_control_urb(urb, dev->udev, usb_sndctrlpipe(dev->udev, 0),
-		(void *)&usb_context->req, data, size,
-		smsc95xx_async_cmd_callback,
-		(void *)usb_context);
-
-	status = usb_submit_urb(urb, GFP_ATOMIC);
-	if (status < 0) {
-		netdev_warn(dev->net, "Error submitting control msg, sts=%d\n",
-			    status);
-		kfree(usb_context);
-		usb_free_urb(urb);
-	}
-
-	return status;
+	ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
+				     USB_DIR_OUT | USB_TYPE_VENDOR |
+				     USB_RECIP_DEVICE,
+				     0, index, data, size);
+	if (ret < 0)
+		netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
+			    ret);
+	return ret;
 }
 
 /* returns hash bit number for given MAC address