From: Arik Nemtsov <arik@wizery.com>
Date: Thu, 21 Jun 2012 15:10:52 +0000 (+0300)
Subject: wlcore: prevent recovery in the middle of resume
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=725b82775e7901dc92afaddfa45683934e75c33e;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

wlcore: prevent recovery in the middle of resume

Take the mutex early in the resume handler and use the locked version of
the IRQ routine. This ensures any recoveries queued will only take place
after resume has fully completed.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
---

diff --git a/drivers/net/wireless/ti/wlcore/main.c b/drivers/net/wireless/ti/wlcore/main.c
index 0c1e0751ecaa..372ccf277b1e 100644
--- a/drivers/net/wireless/ti/wlcore/main.c
+++ b/drivers/net/wireless/ti/wlcore/main.c
@@ -1723,6 +1723,7 @@ static int wl1271_op_resume(struct ieee80211_hw *hw)
 	struct wl12xx_vif *wlvif;
 	unsigned long flags;
 	bool run_irq_work = false, pending_recovery;
+	int ret;
 
 	wl1271_debug(DEBUG_MAC80211, "mac80211 resume wow=%d",
 		     wl->wow_enabled);
@@ -1738,6 +1739,8 @@ static int wl1271_op_resume(struct ieee80211_hw *hw)
 		run_irq_work = true;
 	spin_unlock_irqrestore(&wl->wl_lock, flags);
 
+	mutex_lock(&wl->mutex);
+
 	/* test the recovery flag before calling any SDIO functions */
 	pending_recovery = test_bit(WL1271_FLAG_RECOVERY_IN_PROGRESS,
 				    &wl->flags);
@@ -1747,13 +1750,15 @@ static int wl1271_op_resume(struct ieee80211_hw *hw)
 			     "run postponed irq_work directly");
 
 		/* don't talk to the HW if recovery is pending */
-		if (!pending_recovery)
-			wlcore_irq(0, wl);
+		if (!pending_recovery) {
+			ret = wlcore_irq_locked(wl);
+			if (ret)
+				wl12xx_queue_recovery_work(wl);
+		}
 
 		wlcore_enable_interrupts(wl);
 	}
 
-	mutex_lock(&wl->mutex);
 	if (pending_recovery) {
 		wl1271_warning("queuing forgotten recovery on resume");
 		ieee80211_queue_work(wl->hw, &wl->recovery_work);