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authorAndrew Morton <akpm@osdl.org>2006-12-09 17:01:49 -0500
committerDavid S. Miller <davem@sunset.davemloft.net>2006-12-11 17:34:36 -0500
commite37b8d931936f88e4b2af66304eb44e69510b86c (patch)
tree3d4dc0521dab807f11b107db494e8c0f24eeba00 /net
parent2653a47b8953f500be13207bdcbcfe803bc40c88 (diff)
[NETPOLL]: Make sure TX lock is taken with BH disabled.
Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/netpoll.c34
1 files changed, 19 insertions, 15 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 8a271285f2f3..156d7fd81fec 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -242,22 +242,26 @@ static void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
242 242
243 /* don't get messages out of order, and no recursion */ 243 /* don't get messages out of order, and no recursion */
244 if (skb_queue_len(&npinfo->txq) == 0 && 244 if (skb_queue_len(&npinfo->txq) == 0 &&
245 npinfo->poll_owner != smp_processor_id() && 245 npinfo->poll_owner != smp_processor_id()) {
246 netif_tx_trylock(dev)) { 246 local_bh_disable(); /* Where's netif_tx_trylock_bh()? */
247 /* try until next clock tick */ 247 if (netif_tx_trylock(dev)) {
248 for (tries = jiffies_to_usecs(1)/USEC_PER_POLL; tries > 0; --tries) { 248 /* try until next clock tick */
249 if (!netif_queue_stopped(dev)) 249 for (tries = jiffies_to_usecs(1)/USEC_PER_POLL;
250 status = dev->hard_start_xmit(skb, dev); 250 tries > 0; --tries) {
251 251 if (!netif_queue_stopped(dev))
252 if (status == NETDEV_TX_OK) 252 status = dev->hard_start_xmit(skb, dev);
253 break; 253
254 254 if (status == NETDEV_TX_OK)
255 /* tickle device maybe there is some cleanup */ 255 break;
256 netpoll_poll(np); 256
257 257 /* tickle device maybe there is some cleanup */
258 udelay(USEC_PER_POLL); 258 netpoll_poll(np);
259
260 udelay(USEC_PER_POLL);
261 }
262 netif_tx_unlock(dev);
259 } 263 }
260 netif_tx_unlock(dev); 264 local_bh_enable();
261 } 265 }
262 266
263 if (status != NETDEV_TX_OK) { 267 if (status != NETDEV_TX_OK) {