net: wireless: bcmdhd: Move FW hang processign to work queue

Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>

1 files changed, 30 insertions, 14 deletions

diff --git a/drivers/net/wireless/bcmdhd/dhd_linux.c b/drivers/net/wireless/bcmdhd/dhd_linux.c
index 80f53b346ced..6cd0d7002c19 100644
--- a/drivers/net/wireless/bcmdhd/dhd_linux.c
+++ b/drivers/net/wireless/bcmdhd/dhd_linux.c
@@ -130,6 +130,9 @@ DECLARE_WAIT_QUEUE_HEAD(dhd_dpc_wait);
 #if defined(OOB_INTR_ONLY)
 extern void dhd_enable_oob_intr(struct dhd_bus *bus, bool enable);
 #endif /* defined(OOB_INTR_ONLY) */
+
+static void dhd_hang_process(struct work_struct *work);
+
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
 MODULE_LICENSE("GPL v2");
 #endif /* LinuxVer */
@@ -248,6 +251,7 @@ typedef struct dhd_info {
 	bool dhd_tasklet_create;
 #endif /* DHDTHREAD */
 	tsk_ctl_t	thr_sysioc_ctl;
+	struct work_struct work_hang;
 
 	/* Wakelocks */
 #if defined(CONFIG_HAS_WAKELOCK) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27))
@@ -2752,6 +2756,8 @@ dhd_attach(osl_t *osh, struct dhd_bus *bus, uint bus_hdrlen, void *dev)
 	}
 	dhd_state |= DHD_ATTACH_STATE_THREADS_CREATED;
 
+	INIT_WORK(&dhd->work_hang, dhd_hang_process);
+
 	/*
 	 * Save the dhd_info into the priv
 	 */
@@ -3634,6 +3640,8 @@ void dhd_detach(dhd_pub_t *dhdp)
 	}
 #endif /* defined(CONFIG_HAS_EARLYSUSPEND) */
 
+	cancel_work_sync(&dhd->work_hang);
+
 #if defined(CONFIG_BCMDHD_WEXT)
 	if (dhd->dhd_state & DHD_ATTACH_STATE_WL_ATTACH) {
 		/* Detatch and unlink in the iw */
@@ -4445,29 +4453,37 @@ dhd_dev_get_pno_status(struct net_device *dev)
 
 #endif /* PNO_SUPPORT */
 
+static void dhd_hang_process(struct work_struct *work)
+{
+	dhd_info_t *dhd;
+	struct net_device *dev;
+
+	dhd = (dhd_info_t *)container_of(work, dhd_info_t, work_hang);
+		dev = dhd->iflist[0]->net;
+
+		if (dev) {
+		rtnl_lock();
+		dev_close(dev);
+		rtnl_unlock();
+#if defined(WL_WIRELESS_EXT)
+		wl_iw_send_priv_event(dev, "HANG");
+#endif
+#if defined(WL_CFG80211)
+		wl_cfg80211_hang(dev, WLAN_REASON_UNSPECIFIED);
+#endif
+       }
+}
+
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27))
 int net_os_send_hang_message(struct net_device *dev)
 {
 	dhd_info_t *dhd = *(dhd_info_t **)netdev_priv(dev);
 	int ret = 0;
-	int need_unlock = 0;
 
 	if (dhd) {
 		if (!dhd->pub.hang_was_sent) {
 			dhd->pub.hang_was_sent = 1;
-			if (!rtnl_is_locked()) {
-				need_unlock = 1;
-				rtnl_lock();
-			}
-			dev_close(dev);
-			if (need_unlock)
-				rtnl_unlock();
-#if defined(CONFIG_BCMDHD_WEXT)
-			ret = wl_iw_send_priv_event(dev, "HANG");
-#endif
-#if defined(WL_CFG80211)
-			ret = wl_cfg80211_hang(dev, WLAN_REASON_UNSPECIFIED);
-#endif
+			schedule_work(&dhd->work_hang);
 		}
 	}
 	return ret;