linux-kernel - [PATCH v2 2/2] iwlwifi: convert final opmode work into a workqueue

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Date:   Tue, 21 Feb 2017 18:10:39 -0800
From:   "Luis R. Rodriguez" <mcgrof@...nel.org>
To:     johannes.berg@...el.com, luciano.coelho@...el.com,
        emmanuel.grumbach@...el.com
Cc:     ming.lei@...onical.com, zajec5@...il.com, linuxwifi@...el.com,
        linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Luis R. Rodriguez" <mcgrof@...nel.org>
Subject: [PATCH v2 2/2] iwlwifi: convert final opmode work into a workqueue

This lets us offload and share all the final opmode related work
necessary for either an opmode driver or new device. This has the most
impact for opmode drivers as this now offloads opmode start for each
device onto the workqueue.

Signed-off-by: Luis R. Rodriguez <mcgrof@...nel.org>
---
 drivers/net/wireless/intel/iwlwifi/iwl-drv.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/iwl-drv.c b/drivers/net/wireless/intel/iwlwifi/iwl-drv.c
index ea88b5cec869..1db372e9c039 100644
--- a/drivers/net/wireless/intel/iwlwifi/iwl-drv.c
+++ b/drivers/net/wireless/intel/iwlwifi/iwl-drv.c
@@ -143,6 +143,8 @@ static struct iwlwifi_opmode_table {
 	[DVM_OP_MODE] = { .name = "iwldvm", .ops = NULL },
 	[MVM_OP_MODE] = { .name = "iwlmvm", .ops = NULL },
 };
+static void iwlwifi_opmode_dowork(struct work_struct *work);
+static DECLARE_WORK(iwlwifi_opmode_work, iwlwifi_opmode_dowork);
 
 #define IWL_DEFAULT_SCAN_CHANNELS 40
 
@@ -1261,7 +1263,7 @@ static void iwlwifi_opmode_start(struct iwlwifi_opmode_table *op)
 		iwlwifi_opmode_start_drv(op, drv);
 }
 
-static void iwlwifi_opmode_dowork(void)
+static void iwlwifi_opmode_dowork(struct work_struct *unused_work)
 {
 	unsigned int i;
 	struct iwlwifi_opmode_table *op;
@@ -1497,7 +1499,7 @@ static void iwl_req_fw_callback(const struct firmware *ucode_raw, void *context)
 	if (err)
 		goto out_unbind;
 
-	iwlwifi_opmode_dowork();
+	schedule_work(&iwlwifi_opmode_work);
 	goto free;
 
  try_again:
@@ -1581,6 +1583,7 @@ struct iwl_drv *iwl_drv_start(struct iwl_trans *trans)
 void iwl_drv_stop(struct iwl_drv *drv)
 {
 	wait_for_completion(&drv->request_firmware_complete);
+	cancel_work_sync(&iwlwifi_opmode_work);
 
 	_iwl_op_mode_stop(drv);
 
@@ -1634,7 +1637,7 @@ int iwl_opmode_register(const char *name, const struct iwl_op_mode_ops *ops)
 	mutex_unlock(&iwlwifi_opmode_table_mtx);
 
 	if (!ret)
-		iwlwifi_opmode_dowork();
+		schedule_work(&iwlwifi_opmode_work);
 
 	return ret;
 }
-- 
2.11.0