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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-14 22:36:04 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-14 22:36:04 (GMT) |
| commit | 249f3c4fe4fdef159d3f9b3f7a6c41a92103c860 (patch) | |
| tree | 58abfec8444741fd3bd403a908be50c4f63d4842 /net/rfkill/core.c | |
| parent | 54573c4a073ff510d028f423ed3074573c7d9437 (diff) | |
| parent | 18558cae0272f8fd9647e69d3fec1565a7949865 (diff) | |
| download | linux-249f3c4fe4fdef159d3f9b3f7a6c41a92103c860.tar.xz | |
Merge 4.5-rc4 into tty-next
We want the fixes in here, and this resolves a merge error in tty_io.c
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/rfkill/core.c')
| -rw-r--r-- | net/rfkill/core.c | 16 |
1 files changed, 4 insertions, 12 deletions
diff --git a/net/rfkill/core.c b/net/rfkill/core.c index f53bf3b6..cf5b69a 100644 --- a/net/rfkill/core.c +++ b/net/rfkill/core.c @@ -1095,17 +1095,6 @@ 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) { @@ -1122,8 +1111,11 @@ 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) |