[PATCH] iwlwifi: mvm: Fix an error handling path in 'ebu_dma_start()'

If the 'cmd_ver' check fails, we must release some memory as already done
in all the other error handling paths of this function.

Fixes: 9e3c39361a30 ("iwlwifi: mvm: support new KEK KCK api")
Signed-off-by: Christophe JAILLET <redacted>
---
  drivers/net/wireless/intel/iwlwifi/mvm/d3.c | 6 ++++--
  1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
index c025188fa9bc..2fb897cbfca6 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/d3.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/d3.c

@@ -810,8 +810,10 @@ static int iwl_mvm_wowlan_config_key_params(struct iwl_mvm *mvm,
  						WOWLAN_KEK_KCK_MATERIAL,
  						IWL_FW_CMD_VER_UNKNOWN);
  		if (WARN_ON(cmd_ver != 2 && cmd_ver != 3 &&
-			    cmd_ver != IWL_FW_CMD_VER_UNKNOWN))
-			return -EINVAL;
+			    cmd_ver != IWL_FW_CMD_VER_UNKNOWN)) {
+			ret = -EINVAL;
+			goto out;
+		}
  		if (cmd_ver == 3)
  			cmd_size = sizeof(struct iwl_wowlan_kek_kck_material_cmd_v3);
  		else