diff --git a/drivers/staging/comedi/drivers/adv_pci1710.c b/drivers/staging/comedi/drivers/adv_pci1710.c
index dbff0f7e7cf5..ddc0dc93d08b 100644
--- a/drivers/staging/comedi/drivers/adv_pci1710.c
+++ b/drivers/staging/comedi/drivers/adv_pci1710.c
@@ -46,8 +46,8 @@
 #define PCI171X_RANGE_UNI	BIT(4)
 #define PCI171X_RANGE_GAIN(x)	(((x) & 0x7) << 0)
 #define PCI171X_MUX_REG		0x04	/* W:   A/D multiplexor control */
-#define PCI171X_MUX_CHANH(x)	(((x) & 0xf) << 8)
-#define PCI171X_MUX_CHANL(x)	(((x) & 0xf) << 0)
+#define PCI171X_MUX_CHANH(x)	(((x) & 0xff) << 8)
+#define PCI171X_MUX_CHANL(x)	(((x) & 0xff) << 0)
 #define PCI171X_MUX_CHAN(x)	(PCI171X_MUX_CHANH(x) | PCI171X_MUX_CHANL(x))
 #define PCI171X_STATUS_REG	0x06	/* R:   status register */
 #define PCI171X_STATUS_IRQ	BIT(11)	/* 1=IRQ occurred */
diff --git a/drivers/staging/rtl8188eu/os_dep/usb_intf.c b/drivers/staging/rtl8188eu/os_dep/usb_intf.c
index a7cac0719b8b..b5d42f411dd8 100644
--- a/drivers/staging/rtl8188eu/os_dep/usb_intf.c
+++ b/drivers/staging/rtl8188eu/os_dep/usb_intf.c
@@ -37,6 +37,7 @@ static const struct usb_device_id rtw_usb_id_tbl[] = {
 	{USB_DEVICE(0x2001, 0x3311)}, /* DLink GO-USB-N150 REV B1 */
 	{USB_DEVICE(0x2001, 0x331B)}, /* D-Link DWA-121 rev B1 */
 	{USB_DEVICE(0x2357, 0x010c)}, /* TP-Link TL-WN722N v2 */
+	{USB_DEVICE(0x2357, 0x0111)}, /* TP-Link TL-WN727N v5.21 */
 	{USB_DEVICE(0x0df6, 0x0076)}, /* Sitecom N150 v2 */
 	{USB_DEVICE(USB_VENDER_ID_REALTEK, 0xffef)}, /* Rosewill RNX-N150NUB */
 	{}	/* Terminating entry */
diff --git a/drivers/staging/vt6656/baseband.c b/drivers/staging/vt6656/baseband.c
index 8d19ae71e7cc..4e651b698617 100644
--- a/drivers/staging/vt6656/baseband.c
+++ b/drivers/staging/vt6656/baseband.c
@@ -449,8 +449,8 @@ int vnt_vt3184_init(struct vnt_private *priv)
 
 	memcpy(array, addr, length);
 
-	ret = vnt_control_out(priv, MESSAGE_TYPE_WRITE, 0,
-			      MESSAGE_REQUEST_BBREG, length, array);
+	ret = vnt_control_out_blocks(priv, VNT_REG_BLOCK_SIZE,
+				     MESSAGE_REQUEST_BBREG, length, array);
 	if (ret)
 		goto end;
 
diff --git a/drivers/staging/vt6656/card.c b/drivers/staging/vt6656/card.c
index 56cd77fd9ea0..7958fc165462 100644
--- a/drivers/staging/vt6656/card.c
+++ b/drivers/staging/vt6656/card.c
@@ -719,7 +719,7 @@ end:
  */
 int vnt_radio_power_on(struct vnt_private *priv)
 {
-	int ret = true;
+	int ret = 0;
 
 	vnt_exit_deep_sleep(priv);
 
diff --git a/drivers/staging/vt6656/device.h b/drivers/staging/vt6656/device.h
index 6074ceda78bf..50e1c8918040 100644
--- a/drivers/staging/vt6656/device.h
+++ b/drivers/staging/vt6656/device.h
@@ -259,6 +259,7 @@ struct vnt_private {
 	u8 mac_hw;
 	/* netdev */
 	struct usb_device *usb;
+	struct usb_interface *intf;
 
 	u64 tsf_time;
 	u8 rx_rate;
diff --git a/drivers/staging/vt6656/main_usb.c b/drivers/staging/vt6656/main_usb.c
index 4ac85ecb0921..9cb924c54571 100644
--- a/drivers/staging/vt6656/main_usb.c
+++ b/drivers/staging/vt6656/main_usb.c
@@ -949,7 +949,7 @@ static const struct ieee80211_ops vnt_mac_ops = {
 
 int vnt_init(struct vnt_private *priv)
 {
-	if (!(vnt_init_registers(priv)))
+	if (vnt_init_registers(priv))
 		return -EAGAIN;
 
 	SET_IEEE80211_PERM_ADDR(priv->hw, priv->permanent_net_addr);
@@ -992,6 +992,7 @@ vt6656_probe(struct usb_interface *intf, const struct usb_device_id *id)
 	priv = hw->priv;
 	priv->hw = hw;
 	priv->usb = udev;
+	priv->intf = intf;
 
 	vnt_set_options(priv);
 
diff --git a/drivers/staging/vt6656/usbpipe.c b/drivers/staging/vt6656/usbpipe.c
index d3304df6bd53..d977d4777e4f 100644
--- a/drivers/staging/vt6656/usbpipe.c
+++ b/drivers/staging/vt6656/usbpipe.c
@@ -59,7 +59,9 @@ int vnt_control_out(struct vnt_private *priv, u8 request, u16 value,
 
 	kfree(usb_buffer);
 
-	if (ret >= 0 && ret < (int)length)
+	if (ret == (int)length)
+		ret = 0;
+	else
 		ret = -EIO;
 
 end_unlock:
@@ -74,6 +76,23 @@ int vnt_control_out_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 data)
 			       reg_off, reg, sizeof(u8), &data);
 }
 
+int vnt_control_out_blocks(struct vnt_private *priv,
+			   u16 block, u8 reg, u16 length, u8 *data)
+{
+	int ret = 0, i;
+
+	for (i = 0; i < length; i += block) {
+		u16 len = min_t(int, length - i, block);
+
+		ret = vnt_control_out(priv, MESSAGE_TYPE_WRITE,
+				      i, reg, len, data + i);
+		if (ret)
+			goto end;
+	}
+end:
+	return ret;
+}
+
 int vnt_control_in(struct vnt_private *priv, u8 request, u16 value,
 		   u16 index, u16 length, u8 *buffer)
 {
@@ -103,7 +122,9 @@ int vnt_control_in(struct vnt_private *priv, u8 request, u16 value,
 
 	kfree(usb_buffer);
 
-	if (ret >= 0 && ret < (int)length)
+	if (ret == (int)length)
+		ret = 0;
+	else
 		ret = -EIO;
 
 end_unlock:
diff --git a/drivers/staging/vt6656/usbpipe.h b/drivers/staging/vt6656/usbpipe.h
index 95147ec7b96a..b65d9c01a211 100644
--- a/drivers/staging/vt6656/usbpipe.h
+++ b/drivers/staging/vt6656/usbpipe.h
@@ -18,6 +18,8 @@
 
 #include "device.h"
 
+#define VNT_REG_BLOCK_SIZE	64
+
 int vnt_control_out(struct vnt_private *priv, u8 request, u16 value,
 		    u16 index, u16 length, u8 *buffer);
 int vnt_control_in(struct vnt_private *priv, u8 request, u16 value,
@@ -26,6 +28,9 @@ int vnt_control_in(struct vnt_private *priv, u8 request, u16 value,
 int vnt_control_out_u8(struct vnt_private *priv, u8 reg, u8 ref_off, u8 data);
 int vnt_control_in_u8(struct vnt_private *priv, u8 reg, u8 reg_off, u8 *data);
 
+int vnt_control_out_blocks(struct vnt_private *priv,
+			   u16 block, u8 reg, u16 len, u8 *data);
+
 int vnt_start_interrupt_urb(struct vnt_private *priv);
 int vnt_submit_rx_urb(struct vnt_private *priv, struct vnt_rcb *rcb);
 int vnt_tx_context(struct vnt_private *priv,
diff --git a/drivers/staging/vt6656/wcmd.c b/drivers/staging/vt6656/wcmd.c
index 3eb2f11a5de1..2c5250ca2801 100644
--- a/drivers/staging/vt6656/wcmd.c
+++ b/drivers/staging/vt6656/wcmd.c
@@ -99,6 +99,7 @@ void vnt_run_command(struct work_struct *work)
 		if (vnt_init(priv)) {
 			/* If fail all ends TODO retry */
 			dev_err(&priv->usb->dev, "failed to start\n");
+			usb_set_intfdata(priv->intf, NULL);
 			ieee80211_free_hw(priv->hw);
 			return;
 		}