[PATCH] Improvev netconsole support for RTL8139 NIC driver

[yshi]

In current RTL8139 NIC driver, spin_lock()/spin_unlock() is used
for irq handler. But for netconsole/netpoll, it prefers
spin_lock_irqsave()/spin_unlcok_irqrestore(). So this patch fixed
this problem to improve netconsole/netpoll support.

Signed-off-by: Yang Shi <yang.shi@xxxxxxxxxxxxx>
---
b/drivers/net/8139too.c |    9 +++++++++
1 file changed, 9 insertions(+)
---

--- a/drivers/net/8139too.c
+++ b/drivers/net/8139too.c
@@ -2136,8 +2136,13 @@ static irqreturn_t rtl8139_interrupt (in
       u16 status, ackstat;
       int link_changed = 0; /* avoid bogus "uninit" warning */
       int handled = 0;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+       unsigned long flags;

+       spin_lock_irqsave (&tp->lock, flags);
+#else
       spin_lock (&tp->lock);
+#endif
       status = RTL_R16 (IntrStatus);

       /* shared irq? */
@@ -2185,7 +2190,11 @@ static irqreturn_t rtl8139_interrupt (in
                       RTL_W16 (IntrStatus, TxErr);
       }
 out:
+#ifdef CONFIG_NET_POLL_CONTROLLER
+       spin_unlock_irqrestore (&tp->lock, flags);
+#else
       spin_unlock (&tp->lock);
+#endif

       DPRINTK ("%s: exiting interrupt, intr_status=%#4.4x.\n",
                dev->name, RTL_R16 (IntrStatus));

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