[media] lirc_dev: avoid potential null-dereference

We have to check pointer for NULL and then dereference it.

Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/media/rc/lirc_dev.c b/drivers/media/rc/lirc_dev.c
index 1e0545a67959..4de0e85af805 100644
--- a/drivers/media/rc/lirc_dev.c
+++ b/drivers/media/rc/lirc_dev.c
@@ -553,14 +553,14 @@ unsigned int lirc_dev_fop_poll(struct file *file, poll_table *wait)
         if (!ir->attached)
                 return POLLERR;
 
-        poll_wait(file, &ir->buf->wait_poll, wait);
+        if (ir->buf) {
+                poll_wait(file, &ir->buf->wait_poll, wait);
 
-        if (ir->buf)
                 if (lirc_buffer_empty(ir->buf))
                         ret = 0;
                 else
                         ret = POLLIN | POLLRDNORM;
-        else
+        } else
                 ret = POLLERR;
 
         dev_dbg(ir->d.dev, LOGHEAD "poll result = %d\n",