Commit e2821011 authored May 08, 2013 by Johannes Berg

iwlwifi: mvm: sanity check context in iwl_mvm_phy_ctxt_unref()



In some botched (!) restart scenarios we seem to get here with
a NULL PHY context, so warn and exit instead of crashing.

Reported-by: Omer Kremer <omerx.kremer@intel.com>
Reviewed-by: Ilan Peer <ilan.peer@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

parent afc66bb7

drivers/net/wireless/iwlwifi/mvm/phy-ctxt.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -245,5 +245,9 @@ int iwl_mvm_phy_ctxt_changed(struct iwl_mvm mvm, struct iwl_mvm_phy_ctxt ctxt,
		void iwl_mvm_phy_ctxt_unref(struct iwl_mvm mvm, struct iwl_mvm_phy_ctxt ctxt)
		{
		lockdep_assert_held(&mvm->mutex);

		if (WARN_ON_ONCE(!ctxt))
		return;

		ctxt->ref--;
		}