Merge remote-tracking branch 'mac80211-next/master'

[karo-tx-linux.git] / net / rfkill / core.c

diff --git a/net/rfkill/core.c b/net/rfkill/core.c
index a805831d5d9bc2ae0c2315daff1b0aad1c2d758c..48ebccf0fe727f70e9f09d77b053cf4e2d2324ca 100644 (file)
--- a/net/rfkill/core.c
+++ b/net/rfkill/core.c
@@ -1088,17 +1088,6 @@ static unsigned int rfkill_fop_poll(struct file *file, poll_table *wait)
        return res;
 }
 
-static bool rfkill_readable(struct rfkill_data *data)
-{
-       bool r;
-
-       mutex_lock(&data->mtx);
-       r = !list_empty(&data->events);
-       mutex_unlock(&data->mtx);
-
-       return r;
-}
-
 static ssize_t rfkill_fop_read(struct file *file, char __user *buf,
                               size_t count, loff_t *pos)
 {
@@ -1115,8 +1104,11 @@ static ssize_t rfkill_fop_read(struct file *file, char __user *buf,
                        goto out;
                }
                mutex_unlock(&data->mtx);
+               /* since we re-check and it just compares pointers,
+                * using !list_empty() without locking isn't a problem
+                */
                ret = wait_event_interruptible(data->read_wait,
-                                              rfkill_readable(data));
+                                              !list_empty(&data->events));
                mutex_lock(&data->mtx);
 
                if (ret)