netdev - [PATCH net-next 06/15] net: airo: Invoke airo_read_wireless

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Message-Id: <20201027225454.3492351-7-bigeasy@linutronix.de>
Date:   Tue, 27 Oct 2020 23:54:45 +0100
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     netdev@...r.kernel.org
Cc:     Aymen Sghaier <aymen.sghaier@....com>,
        Daniel Drake <dsd@...too.org>,
        "David S. Miller" <davem@...emloft.net>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Horia Geantă <horia.geanta@....com>,
        Jakub Kicinski <kuba@...nel.org>, Jon Mason <jdmason@...zu.us>,
        Jouni Malinen <j@...fi>, Kalle Valo <kvalo@...eaurora.org>,
        Leon Romanovsky <leon@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-crypto@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-rdma@...r.kernel.org,
        linux-wireless@...r.kernel.org, Li Yang <leoyang.li@....com>,
        Madalin Bucur <madalin.bucur@....com>,
        Ping-Ke Shih <pkshih@...ltek.com>,
        Rain River <rain.1986.08.12@...il.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Samuel Chessman <chessman@....org>,
        Ulrich Kunitz <kune@...ne-taler.de>,
        Zhu Yanjun <zyjzyj2000@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [PATCH net-next 06/15] net: airo: Invoke airo_read_wireless_stats() directly

airo_get_wireless_stats() is the iw_handler_if::get_wireless_stats()
callback of this driver. This callback was not allowed to sleep until
commit a160ee69c6a46 ("wext: let get_wireless_stats() sleep") in v2.6.32.

airo still delegates the readout to a thread, which is not longer
necessary.

Invoke airo_read_wireless_stats() directly from the callback and remove
the now unused JOB_WSTATS handling.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: Kalle Valo <kvalo@...eaurora.org>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Jakub Kicinski <kuba@...nel.org>
Cc: linux-wireless@...r.kernel.org
Cc: netdev@...r.kernel.org
---
 drivers/net/wireless/cisco/airo.c | 22 +++++-----------------
 1 file changed, 5 insertions(+), 17 deletions(-)

diff --git a/drivers/net/wireless/cisco/airo.c b/drivers/net/wireless/cisco/airo.c
index 87b9398b03fd4..ca423f3b6b3ea 100644
--- a/drivers/net/wireless/cisco/airo.c
+++ b/drivers/net/wireless/cisco/airo.c
@@ -1144,7 +1144,6 @@ static int airo_thread(void *data);
 static void timer_func(struct net_device *dev);
 static int airo_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 static struct iw_statistics *airo_get_wireless_stats(struct net_device *dev);
-static void airo_read_wireless_stats(struct airo_info *local);
 #ifdef CISCO_EXT
 static int readrids(struct net_device *dev, aironet_ioctl *comp);
 static int writerids(struct net_device *dev, aironet_ioctl *comp);
@@ -1200,7 +1199,6 @@ struct airo_info {
 #define JOB_MIC	5
 #define JOB_EVENT	6
 #define JOB_AUTOWEP	7
-#define JOB_WSTATS	8
 #define JOB_SCAN_RESULTS  9
 	unsigned long jobs;
 	int (*bap_read)(struct airo_info*, __le16 *pu16Dst, int bytelen,
@@ -3155,8 +3153,6 @@ static int airo_thread(void *data)
 			airo_end_xmit11(dev);
 		else if (test_bit(JOB_STATS, &ai->jobs))
 			airo_read_stats(dev);
-		else if (test_bit(JOB_WSTATS, &ai->jobs))
-			airo_read_wireless_stats(ai);
 		else if (test_bit(JOB_PROMISC, &ai->jobs))
 			airo_set_promisc(ai);
 		else if (test_bit(JOB_MIC, &ai->jobs))
@@ -7732,15 +7728,12 @@ static void airo_read_wireless_stats(struct airo_info *local)
 	__le32 *vals = stats_rid.vals;
 
 	/* Get stats out of the card */
-	clear_bit(JOB_WSTATS, &local->jobs);
-	if (local->power.event) {
-		up(&local->sem);
+	if (local->power.event)
 		return;
-	}
+
 	readCapabilityRid(local, &cap_rid, 0);
 	readStatusRid(local, &status_rid, 0);
 	readStatsRid(local, &stats_rid, RID_STATS, 0);
-	up(&local->sem);
 
 	/* The status */
 	local->wstats.status = le16_to_cpu(status_rid.mode);
@@ -7783,15 +7776,10 @@ static struct iw_statistics *airo_get_wireless_stats(struct net_device *dev)
 {
 	struct airo_info *local =  dev->ml_priv;
 
-	if (!test_bit(JOB_WSTATS, &local->jobs)) {
-		/* Get stats out of the card if available */
-		if (down_trylock(&local->sem) != 0) {
-			set_bit(JOB_WSTATS, &local->jobs);
-			wake_up_interruptible(&local->thr_wait);
-		} else
-			airo_read_wireless_stats(local);
+	if (!down_interruptible(&local->sem)) {
+		airo_read_wireless_stats(local);
+		up(&local->sem);
 	}
-
 	return &local->wstats;
 }
 
-- 
2.28.0