linux-kernel - [PATCH AUTOSEL 4.4 34/38] iwlwifi: add an extra firmware state in the transport

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Date:   Tue, 22 Dec 2020 21:25:12 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Johannes Berg <johannes.berg@...el.com>,
        Luca Coelho <luciano.coelho@...el.com>,
        Sasha Levin <sashal@...nel.org>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 4.4 34/38] iwlwifi: add an extra firmware state in the transport

From: Johannes Berg <johannes.berg@...el.com>

[ Upstream commit b2ed841ed070ccbe908016537f429a3a8f0221bf ]

Start tracking not just if the firmware is dead or alive,
but also if it's starting.

Signed-off-by: Johannes Berg <johannes.berg@...el.com>
Signed-off-by: Luca Coelho <luciano.coelho@...el.com>
Link: https://lore.kernel.org/r/iwlwifi.20201209231352.33e50d40b688.I8bbd41af7aa5e769273a6fc1c06fbf548dd2eb26@changeid
Signed-off-by: Luca Coelho <luciano.coelho@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/wireless/iwlwifi/iwl-trans.h | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.h b/drivers/net/wireless/iwlwifi/iwl-trans.h
index 8dd30de1976f0..ea60143e60fa4 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/iwlwifi/iwl-trans.h
@@ -619,12 +619,14 @@ struct iwl_trans_ops {
 /**
  * enum iwl_trans_state - state of the transport layer
  *
- * @IWL_TRANS_NO_FW: no fw has sent an alive response
- * @IWL_TRANS_FW_ALIVE: a fw has sent an alive response
+ * @IWL_TRANS_NO_FW: firmware wasn't started yet, or crashed
+ * @IWL_TRANS_FW_STARTED: FW was started, but not alive yet
+ * @IWL_TRANS_FW_ALIVE: FW has sent an alive response
  */
 enum iwl_trans_state {
-	IWL_TRANS_NO_FW = 0,
-	IWL_TRANS_FW_ALIVE	= 1,
+	IWL_TRANS_NO_FW,
+	IWL_TRANS_FW_STARTED,
+	IWL_TRANS_FW_ALIVE,
 };
 
 /**
@@ -780,12 +782,18 @@ static inline int iwl_trans_start_fw(struct iwl_trans *trans,
 				     const struct fw_img *fw,
 				     bool run_in_rfkill)
 {
+	int ret;
+
 	might_sleep();
 
 	WARN_ON_ONCE(!trans->rx_mpdu_cmd);
 
 	clear_bit(STATUS_FW_ERROR, &trans->status);
-	return trans->ops->start_fw(trans, fw, run_in_rfkill);
+	ret = trans->ops->start_fw(trans, fw, run_in_rfkill);
+	if (ret == 0)
+		trans->state = IWL_TRANS_FW_STARTED;
+
+	return ret;
 }
 
 static inline int iwl_trans_update_sf(struct iwl_trans *trans,
-- 
2.27.0