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authorJarek Poplawski <jarkao2@o2.pl>2007-07-05 17:42:44 -0700
committerDavid S. Miller <davem@davemloft.net>2007-07-05 17:42:44 -0700
commit25442cafb8cc3d979418caccabc91260707a0947 (patch)
tree3f934e686d37619a211946f5d78dd28fad82e61b
parent94b83419e5b56a87410fd9c9939f0081fc155d65 (diff)
downloadlinux-stericsson-25442cafb8cc3d979418caccabc91260707a0947.tar.gz
[NETPOLL]: Fixups for 'fix soft lockup when removing module'
>From my recent patch: > > #1 > > Until kernel ver. 2.6.21 (including) cancel_rearming_delayed_work() > > required a work function should always (unconditionally) rearm with > > delay > 0 - otherwise it would endlessly loop. This patch replaces > > this function with cancel_delayed_work(). Later kernel versions don't > > require this, so here it's only for uniformity. But Oleg Nesterov <oleg@tv-sign.ru> found: > But 2.6.22 doesn't need this change, why it was merged? > > In fact, I suspect this change adds a race, ... His description was right (thanks), so this patch reverts #1. Signed-off-by: Jarek Poplawski <jarkao2@o2.pl> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/core/netpoll.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index cf40ff91ac01..a0efdd7a6b37 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -72,8 +72,7 @@ static void queue_process(struct work_struct *work)
netif_tx_unlock(dev);
local_irq_restore(flags);
- if (atomic_read(&npinfo->refcnt))
- schedule_delayed_work(&npinfo->tx_work, HZ/10);
+ schedule_delayed_work(&npinfo->tx_work, HZ/10);
return;
}
netif_tx_unlock(dev);
@@ -786,8 +785,7 @@ void netpoll_cleanup(struct netpoll *np)
if (atomic_dec_and_test(&npinfo->refcnt)) {
skb_queue_purge(&npinfo->arp_tx);
skb_queue_purge(&npinfo->txq);
- cancel_delayed_work(&npinfo->tx_work);
- flush_scheduled_work();
+ cancel_rearming_delayed_work(&npinfo->tx_work);
/* clean after last, unfinished work */
if (!skb_queue_empty(&npinfo->txq)) {