[PATCH 07/10] iwlwifi: mvm: don't fail when removing a key from an inexisting sta

[Luca Coelho]

From: Luca Coelho <luciano.coe...@intel.com>

The iwl_mvm_remove_sta_key() function handles removing a key when the
sta doesn't exist anymore.  Mistakenly, this was changed to return an
error while fixing another bug.

If the mvm_sta doesn't exist, we continue normally, but just don't try
to remove the igtk key.

Fixes: cd4d23c1ea9b ("iwlwifi: mvm: Fix removal of IGTK")
Signed-off-by: Luca Coelho <luciano.coe...@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/sta.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c 
b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
index 9184ce09b89a..614d67810d05 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c
@@ -3332,18 +3332,15 @@ int iwl_mvm_remove_sta_key(struct iwl_mvm *mvm,
 
        /* Get the station from the mvm local station table */
        mvm_sta = iwl_mvm_get_key_sta(mvm, vif, sta);
-       if (!mvm_sta) {
-               IWL_ERR(mvm, "Failed to find station\n");
-               return -EINVAL;
-       }
-       sta_id = mvm_sta->sta_id;
+       if (mvm_sta)
+               sta_id = mvm_sta->sta_id;
 
        IWL_DEBUG_WEP(mvm, "mvm remove dynamic key: idx=%d sta=%d\n",
                      keyconf->keyidx, sta_id);
 
-       if (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
-           keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
-           keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256)
+       if (mvm_sta && (keyconf->cipher == WLAN_CIPHER_SUITE_AES_CMAC ||
+                       keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_128 ||
+                       keyconf->cipher == WLAN_CIPHER_SUITE_BIP_GMAC_256))
                return iwl_mvm_send_sta_igtk(mvm, keyconf, sta_id, true);
 
        if (!__test_and_clear_bit(keyconf->hw_key_idx, mvm->fw_key_table)) {
-- 
2.11.0