linux-kernel - [PATCH v2 29/55] staging: wfx: simplify handling of tx_lock in wfx_do

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Date:   Tue, 17 Dec 2019 16:15:08 +0000
From:   Jérôme Pouiller <Jerome.Pouiller@...abs.com>
To:     "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jérôme Pouiller <Jerome.Pouiller@...abs.com>
Subject: [PATCH v2 29/55] staging: wfx: simplify handling of tx_lock in
 wfx_do_join()

From: Jérôme Pouiller <jerome.pouiller@...abs.com>

In the old days, wfx_do_join() could be called from different contexts.
Now that wfx_do_join() is called only from one place, it is cleaner to
keep lock and unlock of data inside the function.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@...abs.com>
---
 drivers/staging/wfx/sta.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/wfx/sta.c b/drivers/staging/wfx/sta.c
index 939c64f108ed..62e65493a4fe 100644
--- a/drivers/staging/wfx/sta.c
+++ b/drivers/staging/wfx/sta.c
@@ -644,7 +644,6 @@ static void wfx_set_mfp(struct wfx_vif *wvif,
 	hif_set_mfp(wvif, mfpc, mfpr);
 }
 
-/* MUST be called with tx_lock held!  It will be unlocked for us. */
 static void wfx_do_join(struct wfx_vif *wvif)
 {
 	const u8 *bssid;
@@ -659,6 +658,8 @@ static void wfx_do_join(struct wfx_vif *wvif)
 						      conf->basic_rates),
 	};
 
+	wfx_tx_lock_flush(wvif->wdev);
+
 	if (wvif->channel->flags & IEEE80211_CHAN_NO_IR)
 		join.probe_for_join = 0;
 
@@ -1180,10 +1181,8 @@ void wfx_bss_info_changed(struct ieee80211_hw *hw,
 	}
 	mutex_unlock(&wdev->conf_mutex);
 
-	if (do_join) {
-		wfx_tx_lock_flush(wdev);
-		wfx_do_join(wvif); /* Will unlock it for us */
-	}
+	if (do_join)
+		wfx_do_join(wvif);
 }
 
 static void wfx_ps_notify(struct wfx_vif *wvif, enum sta_notify_cmd notify_cmd,
-- 
2.24.0