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authorJay Vosburgh <fubar@us.ibm.com>2007-02-28 17:03:20 -0800
committerJeff Garzik <jeff@garzik.org>2007-03-06 06:08:11 -0500
commitc4f283b1f275e5528c13c119e5cfc80cdba55d00 (patch)
tree2d5b172fe18c84029619b3a5dca524a24f9c4e49 /drivers/net/bonding
parentc3442e296517aee733d62fc3fe03211598902c7d (diff)
downloadop-kernel-dev-c4f283b1f275e5528c13c119e5cfc80cdba55d00.zip
op-kernel-dev-c4f283b1f275e5528c13c119e5cfc80cdba55d00.tar.gz
bonding: fix double dev_add_pack
Bonding can erroneously register the same packet_type to receive ARPs (for use by ARP validation): once at device open time, and once via sysfs. Since sysfs can change the validate setting (and thus register or unregister) at any time, a flag is needed to synchronize with device open in order to avoid double registrations, and the simplest place is within the packet_type structure itself. Double unregister is not an issue. Bug reported by Ulrich Oelmann <ulrich.oelmann@web.de>. Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/bonding')
-rw-r--r--drivers/net/bonding/bond_main.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index ea73ebf..68afcb5 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -3423,6 +3423,9 @@ void bond_register_arp(struct bonding *bond)
{
struct packet_type *pt = &bond->arp_mon_pt;
+ if (pt->type)
+ return;
+
pt->type = htons(ETH_P_ARP);
pt->dev = NULL; /*bond->dev;XXX*/
pt->func = bond_arp_rcv;
@@ -3431,7 +3434,10 @@ void bond_register_arp(struct bonding *bond)
void bond_unregister_arp(struct bonding *bond)
{
- dev_remove_pack(&bond->arp_mon_pt);
+ struct packet_type *pt = &bond->arp_mon_pt;
+
+ dev_remove_pack(pt);
+ pt->type = 0;
}
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