[PATCH net-next] r8152: add rtnl_lock

[Hayes Wang]

Add rtnl_lock() for suspend/resume and workqueue.

Signed-off-by: Hayes Wang <hayesw...@realtek.com>
---
 drivers/net/usb/r8152.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 5cfd414..2b2b679 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -26,7 +26,7 @@
 #include <linux/mdio.h>
 
 /* Version Information */
-#define DRIVER_VERSION "v1.06.1 (2014/10/01)"
+#define DRIVER_VERSION "v1.07.0 (2014/10/09)"
 #define DRIVER_AUTHOR "Realtek linux nic maintainers <nic_s...@realtek.com>"
 #define DRIVER_DESC "Realtek RTL8152/RTL8153 Based USB Ethernet Adapters"
 #define MODULENAME "r8152"
@@ -2851,6 +2851,11 @@ static void rtl_work_func_t(struct work_struct *work)
        if (test_bit(RTL8152_UNPLUG, &tp->flags))
                goto out1;
 
+       if (!rtnl_trylock()) {
+               schedule_delayed_work(&tp->schedule, 0);
+               goto out1;
+       }
+
        if (test_bit(RTL8152_LINK_CHG, &tp->flags))
                set_carrier(tp);
 
@@ -2866,6 +2871,8 @@ static void rtl_work_func_t(struct work_struct *work)
        if (test_bit(PHY_RESET, &tp->flags))
                rtl_phy_reset(tp);
 
+       rtnl_unlock();
+
 out1:
        usb_autopm_put_interface(tp->intf);
 }
@@ -3169,6 +3176,8 @@ static int rtl8152_suspend(struct usb_interface *intf, 
pm_message_t message)
 {
        struct r8152 *tp = usb_get_intfdata(intf);
 
+       rtnl_lock();
+
        if (PMSG_IS_AUTO(message))
                set_bit(SELECTIVE_SUSPEND, &tp->flags);
        else
@@ -3188,6 +3197,8 @@ static int rtl8152_suspend(struct usb_interface *intf, 
pm_message_t message)
                tasklet_enable(&tp->tl);
        }
 
+       rtnl_unlock();
+
        return 0;
 }
 
@@ -3195,6 +3206,8 @@ static int rtl8152_resume(struct usb_interface *intf)
 {
        struct r8152 *tp = usb_get_intfdata(intf);
 
+       rtnl_lock();
+
        if (!test_bit(SELECTIVE_SUSPEND, &tp->flags)) {
                tp->rtl_ops.init(tp);
                netif_device_attach(tp->netdev);
@@ -3220,6 +3233,8 @@ static int rtl8152_resume(struct usb_interface *intf)
                usb_submit_urb(tp->intr_urb, GFP_KERNEL);
        }
 
+       rtnl_unlock();
+
        return 0;
 }
 
-- 
1.9.3

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