iwlwifi: trans: prevent tx and cmds during FW error

Stop Tx and commands from arriving to the transport layer when a FW
error has occurred. A HW recovery should take place before. Remove
transport specific checks of the same nature (note that not all
transports were protected).

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.h b/drivers/net/wireless/iwlwifi/iwl-trans.h
index 6419603..c71519d 100644 (file)
--- a/drivers/net/wireless/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/iwlwifi/iwl-trans.h
@@ -620,6 +620,9 @@ static inline int iwl_trans_send_cmd(struct iwl_trans *trans,
 {
        int ret;
 
+       if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status)))
+               return -EIO;
+
        if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) {
                IWL_ERR(trans, "%s bad state = %d", __func__, trans->state);
                return -EIO;
@@ -659,6 +662,9 @@ static inline void iwl_trans_free_tx_cmd(struct iwl_trans *trans,
 static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb,
                               struct iwl_device_cmd *dev_cmd, int queue)
 {
+       if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status)))
+               return -EIO;
+
        if (unlikely(trans->state != IWL_TRANS_FW_ALIVE))
                IWL_ERR(trans, "%s bad state = %d", __func__, trans->state);
 

diff --git a/drivers/net/wireless/iwlwifi/pcie/tx.c b/drivers/net/wireless/iwlwifi/pcie/tx.c
index a36884e..5b63948 100644 (file)
--- a/drivers/net/wireless/iwlwifi/pcie/tx.c
+++ b/drivers/net/wireless/iwlwifi/pcie/tx.c
@@ -1606,9 +1606,6 @@ cancel:
 
 int iwl_trans_pcie_send_hcmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
 {
-       if (test_bit(STATUS_FW_ERROR, &trans->status))
-               return -EIO;
-
        if (!(cmd->flags & CMD_SEND_IN_RFKILL) &&
            test_bit(STATUS_RFKILL, &trans->status)) {
                IWL_DEBUG_RF_KILL(trans, "Dropping CMD 0x%x: RF KILL\n",