net: Optimize hard_start_xmit() return checking

[safe/jmp/linux-2.6] / net / core / netpoll.c

diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index df30feb..0b4d0d3 100644 (file)
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -9,6 +9,7 @@
  * Copyright (C) 2002  Red Hat, Inc.
  */
 
+#include <linux/moduleparam.h>
 #include <linux/netdevice.h>
 #include <linux/etherdevice.h>
 #include <linux/string.h>
@@ -50,6 +51,9 @@ static atomic_t trapped;
 static void zap_completion_queue(void);
 static void arp_reply(struct sk_buff *skb);
 
+static unsigned int carrier_timeout = 4;
+module_param(carrier_timeout, uint, 0644);
+
 static void queue_process(struct work_struct *work)
 {
        struct netpoll_info *npinfo =
@@ -319,6 +323,11 @@ static void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
 
                        udelay(USEC_PER_POLL);
                }
+
+               WARN_ONCE(!irqs_disabled(),
+                       "netpoll_send_skb(): %s enabled interrupts in poll (%pF)\n",
+                       dev->name, ops->ndo_start_xmit);
+
                local_irq_restore(flags);
        }
 
@@ -732,7 +741,7 @@ int netpoll_setup(struct netpoll *np)
                }
 
                atleast = jiffies + HZ/10;
-               atmost = jiffies + 4*HZ;
+               atmost = jiffies + carrier_timeout * HZ;
                while (!netif_carrier_ok(ndev)) {
                        if (time_after(jiffies, atmost)) {
                                printk(KERN_NOTICE