Input: fix polling of /proc/bus/input/devices

Tested-by: Alessio Sangalli <alesan@manoweb.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/input/input.c b/drivers/input/input.c
index 46e9ce195064..913392f63f76 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -744,11 +744,11 @@ static inline void input_wakeup_procfs_readers(void)
 
 static unsigned int input_proc_devices_poll(struct file *file, poll_table *wait)
 {
-        int state = input_devices_state;
-
         poll_wait(file, &input_devices_poll_wait, wait);
-        if (state != input_devices_state)
+        if (file->f_version != input_devices_state) {
+                file->f_version = input_devices_state;
                 return POLLIN | POLLRDNORM;
+        }
 
         return 0;
 }