mwifiex: fix potential null dereference 'mef_entry'

drivers/net/wireless/mwifiex/cfg80211.c:2357 mwifiex_cfg80211_suspend()
  error: potential null dereference 'mef_entry'
  (kzalloc returns null)

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/mwifiex/cfg80211.c b/drivers/net/wireless/mwifiex/cfg80211.c
index df30107225f82b11c7fd47776daa4ee9e628e29f..c9bc5f5ba6e13795acc1a4cde00e894506fb7883 100644 (file)
--- a/drivers/net/wireless/mwifiex/cfg80211.c
+++ b/drivers/net/wireless/mwifiex/cfg80211.c
@@ -2350,9 +2350,12 @@ static int mwifiex_cfg80211_suspend(struct wiphy *wiphy,
                return 0;
        }
 
+       mef_entry = kzalloc(sizeof(*mef_entry), GFP_KERNEL);
+       if (!mef_entry)
+               return -ENOMEM;
+
        memset(&mef_cfg, 0, sizeof(mef_cfg));
        mef_cfg.num_entries = 1;
-       mef_entry = kzalloc(sizeof(*mef_entry), GFP_KERNEL);
        mef_cfg.mef_entry = mef_entry;
        mef_entry->mode = MEF_MODE_HOST_SLEEP;
        mef_entry->action = MEF_ACTION_ALLOW_AND_WAKEUP_HOST;