iwlwifi: mvm: fix locking in iwl_mvm_ipv6_addr_change

inet6_dev->lock can be taken from a timer. Disabled bottom
halves when we take it.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/mvm/d3.c b/drivers/net/wireless/iwlwifi/mvm/d3.c
index 9a95c37..5b2c675 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/d3.c
+++ b/drivers/net/wireless/iwlwifi/mvm/d3.c
@@ -97,14 +97,14 @@ void iwl_mvm_ipv6_addr_change(struct ieee80211_hw *hw,
        struct inet6_ifaddr *ifa;
        int idx = 0;
 
-       read_lock(&idev->lock);
+       read_lock_bh(&idev->lock);
        list_for_each_entry(ifa, &idev->addr_list, if_list) {
                mvmvif->target_ipv6_addrs[idx] = ifa->addr;
                idx++;
                if (idx >= IWL_PROTO_OFFLOAD_NUM_IPV6_ADDRS)
                        break;
        }
-       read_unlock(&idev->lock);
+       read_unlock_bh(&idev->lock);
 
        mvmvif->num_target_ipv6_addrs = idx;
 }