Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (21 commits)
  slip: fix wrong SLIP6 ifdef-endif placing
  natsemi: fix another dma-debug report
  sctp: ABORT if receive, reassmbly, or reodering queue is not empty while closing socket
  net: Fix default in docs for tcp_orphan_retries.
  hso: fix a use after free condition
  net/natsemi: Fix module parameter permissions
  XFRM: Fix memory leak in xfrm_state_update
  sctp: Enforce retransmission limit during shutdown
  mac80211: fix TKIP replay vulnerability
  mac80211: fix ie memory allocation for scheduled scans
  ssb: fix init regression of hostmode PCI core
  rtlwifi: rtl8192cu: Add new USB ID for Netgear WNA1000M
  ath9k: Fix tx throughput drops for AR9003 chips with AES encryption
  carl9170: add NEC WL300NU-AG usbid
  cfg80211: fix deadlock with rfkill/sched_scan by adding new mutex
  ath5k: fix incorrect use of drvdata in PCI suspend/resume code
  ath5k: fix incorrect use of drvdata in sysfs code
  Bluetooth: Fix memory leak under page timeouts
  Bluetooth: Fix regression with incoming L2CAP connections
  Bluetooth: Fix hidp disconnect deadlocks and lost wakeup
  ...

1 files changed, 18 insertions, 6 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index f07602d7bf68..cea338150d05 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3461,9 +3461,6 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
         if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))
                 return -EINVAL;
 
-        if (rdev->sched_scan_req)
-                return -EINPROGRESS;
-
         if (!info->attrs[NL80211_ATTR_SCHED_SCAN_INTERVAL])
                 return -EINVAL;
 
@@ -3502,12 +3499,21 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
         if (ie_len > wiphy->max_scan_ie_len)
                 return -EINVAL;
 
+        mutex_lock(&rdev->sched_scan_mtx);
+
+        if (rdev->sched_scan_req) {
+                err = -EINPROGRESS;
+                goto out;
+        }
+
         request = kzalloc(sizeof(*request)
                         + sizeof(*request->ssids) * n_ssids
                         + sizeof(*request->channels) * n_channels
                         + ie_len, GFP_KERNEL);
-        if (!request)
-                return -ENOMEM;
+        if (!request) {
+                err = -ENOMEM;
+                goto out;
+        }
 
         if (n_ssids)
                 request->ssids = (void *)&request->channels[n_channels];
@@ -3605,6 +3611,7 @@ static int nl80211_start_sched_scan(struct sk_buff *skb,
 out_free:
         kfree(request);
 out:
+        mutex_unlock(&rdev->sched_scan_mtx);
         return err;
 }
 
@@ -3612,12 +3619,17 @@ static int nl80211_stop_sched_scan(struct sk_buff *skb,
                                    struct genl_info *info)
 {
         struct cfg80211_registered_device *rdev = info->user_ptr[0];
+        int err;
 
         if (!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN) ||
             !rdev->ops->sched_scan_stop)
                 return -EOPNOTSUPP;
 
-        return __cfg80211_stop_sched_scan(rdev, false);
+        mutex_lock(&rdev->sched_scan_mtx);
+        err = __cfg80211_stop_sched_scan(rdev, false);
+        mutex_unlock(&rdev->sched_scan_mtx);
+
+        return err;
 }
 
 static int nl80211_send_bss(struct sk_buff *msg, u32 pid, u32 seq, int flags,