Because vxlan module will call ip6_dst_lookup() in TX path,
which will hold write lock. So we have to release this write lock
before calling ndisc_send_rs(), otherwise could deadlock.
Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
static void addrconf_rs_timer(unsigned long data)
{
struct inet6_dev *idev = (struct inet6_dev *)data;
static void addrconf_rs_timer(unsigned long data)
{
struct inet6_dev *idev = (struct inet6_dev *)data;
+ struct net_device *dev = idev->dev;
struct in6_addr lladdr;
write_lock(&idev->lock);
struct in6_addr lladdr;
write_lock(&idev->lock);
goto out;
if (idev->rs_probes++ < idev->cnf.rtr_solicits) {
goto out;
if (idev->rs_probes++ < idev->cnf.rtr_solicits) {
- if (!__ipv6_get_lladdr(idev, &lladdr, IFA_F_TENTATIVE))
- ndisc_send_rs(idev->dev, &lladdr,
+ write_unlock(&idev->lock);
+ if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE))
+ ndisc_send_rs(dev, &lladdr,
&in6addr_linklocal_allrouters);
else
&in6addr_linklocal_allrouters);
else
+ write_lock(&idev->lock);
/* The wait after the last probe can be shorter */
addrconf_mod_rs_timer(idev, (idev->rs_probes ==
idev->cnf.rtr_solicits) ?
/* The wait after the last probe can be shorter */
addrconf_mod_rs_timer(idev, (idev->rs_probes ==
idev->cnf.rtr_solicits) ?
out:
write_unlock(&idev->lock);
out:
write_unlock(&idev->lock);