[PATCH] mwifiex: replace netif_carrier_on/off by netif_device_attach/dettach

[Ganapathi Bhat]

Driver is doing netif_carrier_off during suspend, which will set
the IFF_LOWER_UP flag to 0. As a result certain applications
will think this as a real carrier down and behave accordingly.
This will cause issues like loss of IP address, for example. To
fix this use netif_device_dettach during suspend.

Fixes: 0026b32d723e ('mwifiex: fix Tx timeout issue during suspend test')

Signed-off-by: Cathy Luo <c...@marvell.com>
Signed-off-by: Ganapathi Bhat <gb...@marvell.com>
---
 drivers/net/wireless/marvell/mwifiex/cfg80211.c | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/drivers/net/wireless/marvell/mwifiex/cfg80211.c 
b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
index 2be7817..83605a2 100644
--- a/drivers/net/wireless/marvell/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/marvell/mwifiex/cfg80211.c
@@ -3391,11 +3391,8 @@ static int mwifiex_cfg80211_suspend(struct wiphy *wiphy,
 
        for (i = 0; i < adapter->priv_num; i++) {
                priv = adapter->priv[i];
-               if (priv && priv->netdev) {
-                       mwifiex_stop_net_dev_queue(priv->netdev, adapter);
-                       if (netif_carrier_ok(priv->netdev))
-                               netif_carrier_off(priv->netdev);
-               }
+               if (priv && priv->netdev)
+                       netif_device_detach(priv->netdev);
        }
 
        for (i = 0; i < retry_num; i++) {
@@ -3466,11 +3463,8 @@ static int mwifiex_cfg80211_resume(struct wiphy *wiphy)
 
        for (i = 0; i < adapter->priv_num; i++) {
                priv = adapter->priv[i];
-               if (priv && priv->netdev) {
-                       if (!netif_carrier_ok(priv->netdev))
-                               netif_carrier_on(priv->netdev);
-                       mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);
-               }
+               if (priv && priv->netdev)
+                       netif_device_attach(priv->netdev);
        }
 
        if (!wiphy->wowlan_config)
-- 
1.9.1