Merge tag 'v3.6-rc4'

Merge 3.6-rc4 to get latest OMAP and device tree fixes.

1 files changed, 11 insertions, 3 deletions

diff --git a/drivers/net/wireless/rtlwifi/usb.c b/drivers/net/wireless/rtlwifi/usb.c
index a6049d7d51b3..aa970fc18a21 100644
--- a/drivers/net/wireless/rtlwifi/usb.c
+++ b/drivers/net/wireless/rtlwifi/usb.c
@@ -131,15 +131,19 @@ static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)
 	u8 request;
 	u16 wvalue;
 	u16 index;
-	__le32 *data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
+	__le32 *data;
+	unsigned long flags;
 
+	spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
+	if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
+		rtlpriv->usb_data_index = 0;
+	data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
+	spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);
 	request = REALTEK_USB_VENQT_CMD_REQ;
 	index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 
 	wvalue = (u16)addr;
 	_usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
-	if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
-		rtlpriv->usb_data_index = 0;
 	return le32_to_cpu(*data);
 }
 
@@ -951,6 +955,10 @@ int __devinit rtl_usb_probe(struct usb_interface *intf,
 				    GFP_KERNEL);
 	if (!rtlpriv->usb_data)
 		return -ENOMEM;
+
+	/* this spin lock must be initialized early */
+	spin_lock_init(&rtlpriv->locks.usb_lock);
+
 	rtlpriv->usb_data_index = 0;
 	init_completion(&rtlpriv->firmware_loading_complete);
 	SET_IEEE80211_DEV(hw, &intf->dev);