mwifiex: abort scan upon interface down

When the interface is down, we will abort scan by calling
cfg80211_scan_done() with abort option. This fixes WARN_ON
triggered by cfg80211 in wdev_cleanup_work().

Driver's internal variables/flags are cleared once we get
response for current scan command. Meanwhile we will block
new scan request from cfg80211.

Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/net/wireless/mwifiex/cfg80211.c b/drivers/net/wireless/mwifiex/cfg80211.c
index 60461325dff8..0a067bd0222f 100644
--- a/drivers/net/wireless/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/mwifiex/cfg80211.c
@@ -1828,6 +1828,11 @@ mwifiex_cfg80211_scan(struct wiphy *wiphy,
 
         priv->scan_request = request;
 
+        if (priv->user_scan_cfg) {
+                dev_err(priv->adapter->dev, "cmd: Scan already in process..\n");
+                return -EBUSY;
+        }
+
         priv->user_scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg),
                                       GFP_KERNEL);
         if (!priv->user_scan_cfg) {