diff options
| -rw-r--r-- | drivers/net/wireless/rtlwifi/usb.c | 14 | ||||
| -rw-r--r-- | drivers/net/wireless/rtlwifi/wifi.h | 1 |
2 files changed, 12 insertions, 3 deletions
diff --git a/drivers/net/wireless/rtlwifi/usb.c b/drivers/net/wireless/rtlwifi/usb.c index db34db6adef4..a49e8489538b 100644 --- a/drivers/net/wireless/rtlwifi/usb.c +++ b/drivers/net/wireless/rtlwifi/usb.c @@ -120,15 +120,19 @@ 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); } @@ -909,6 +913,10 @@ 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; SET_IEEE80211_DEV(hw, &intf->dev); udev = interface_to_usbdev(intf); diff --git a/drivers/net/wireless/rtlwifi/wifi.h b/drivers/net/wireless/rtlwifi/wifi.h index b1e9debc9f0a..deb87e959e02 100644 --- a/drivers/net/wireless/rtlwifi/wifi.h +++ b/drivers/net/wireless/rtlwifi/wifi.h @@ -1550,6 +1550,7 @@ struct rtl_locks { spinlock_t rf_lock; spinlock_t lps_lock; spinlock_t waitq_lock; + spinlock_t usb_lock; /*Dual mac*/ spinlock_t cck_and_rw_pagea_lock; |