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authorMatt Mackall <mpm@selenic.com>2005-08-11 19:27:43 -0700
committerDavid S. Miller <davem@davemloft.net>2005-08-11 19:27:43 -0700
commit53fb95d3c14290fd6ee808b221e35493f096246f (patch)
tree146c31c79bbc66d8fde3afa5ae37a04b63041eba /net/core/netpoll.c
parent2652076507b662fc88ba16c27b59c7bdd9ccd956 (diff)
[NETPOLL]: fix initialization/NAPI race
This fixes a race during initialization with the NAPI softirq processing by using an RCU approach. This race was discovered when refill_skbs() was added to the setup code. Signed-off-by: Matt Mackall <mpm@selenic.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/netpoll.c')
-rw-r--r--net/core/netpoll.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index c02a08da6d42..996787bca17f 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -732,6 +732,9 @@ int netpoll_setup(struct netpoll *np)
/* last thing to do is link it to the net device structure */
ndev->npinfo = npinfo;
+ /* avoid racing with NAPI reading npinfo */
+ synchronize_rcu();
+
return 0;
release: