From e5d15cb530082cc13a6c9457eddd6f75b0f4de65 Mon Sep 17 00:00:00 2001 From: Eliad Peller Date: Thu, 17 Dec 2015 13:02:56 +0200 Subject: [PATCH] iwlwifi: bail out in case of bad trans state In case of bad trans state (i.e. fw is not loaded) bail out immediately instead of calling the trans, which might not be fully initialized yet. Also add WARN_ON_ONCE to help debugging where the errorneous call is coming from. Signed-off-by: Eliad Peller Signed-off-by: Emmanuel Grumbach --- .../net/wireless/intel/iwlwifi/iwl-trans.h | 24 ++++++++++++++----- 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h index 290d538a3190..81b7cb71e001 100644 --- a/drivers/net/wireless/intel/iwlwifi/iwl-trans.h +++ b/drivers/net/wireless/intel/iwlwifi/iwl-trans.h @@ -1001,8 +1001,10 @@ static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb, if (unlikely(test_bit(STATUS_FW_ERROR, &trans->status))) return -EIO; - if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) + if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); + return -EIO; + } return trans->ops->tx(trans, skb, dev_cmd, queue); } @@ -1010,8 +1012,10 @@ static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb, static inline void iwl_trans_reclaim(struct iwl_trans *trans, int queue, int ssn, struct sk_buff_head *skbs) { - if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) + if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); + return; + } trans->ops->reclaim(trans, queue, ssn, skbs); } @@ -1029,8 +1033,10 @@ iwl_trans_txq_enable_cfg(struct iwl_trans *trans, int queue, u16 ssn, { might_sleep(); - if (unlikely((trans->state != IWL_TRANS_FW_ALIVE))) + if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); + return; + } trans->ops->txq_enable(trans, queue, ssn, cfg, queue_wdg_timeout); } @@ -1070,8 +1076,10 @@ static inline void iwl_trans_freeze_txq_timer(struct iwl_trans *trans, unsigned long txqs, bool freeze) { - if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) + if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); + return; + } if (trans->ops->freeze_txq_timer) trans->ops->freeze_txq_timer(trans, txqs, freeze); @@ -1080,8 +1088,10 @@ static inline void iwl_trans_freeze_txq_timer(struct iwl_trans *trans, static inline void iwl_trans_block_txq_ptrs(struct iwl_trans *trans, bool block) { - if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) + if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); + return; + } if (trans->ops->block_txq_ptrs) trans->ops->block_txq_ptrs(trans, block); @@ -1090,8 +1100,10 @@ static inline void iwl_trans_block_txq_ptrs(struct iwl_trans *trans, static inline int iwl_trans_wait_tx_queue_empty(struct iwl_trans *trans, u32 txqs) { - if (unlikely(trans->state != IWL_TRANS_FW_ALIVE)) + if (WARN_ON_ONCE(trans->state != IWL_TRANS_FW_ALIVE)) { IWL_ERR(trans, "%s bad state = %d\n", __func__, trans->state); + return -EIO; + } return trans->ops->wait_tx_queue_empty(trans, txqs); } -- 2.20.1