V4L/DVB (10465): dsbr100: Add few lost mutex locks.

Patch adds two lost mutex locks.

Signed-off-by: Alexey Klimov <klimov.linux@gmail.com>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/media/radio/dsbr100.c b/drivers/media/radio/dsbr100.c
index 09988f020c48..cc54ed4efc48 100644
--- a/drivers/media/radio/dsbr100.c
+++ b/drivers/media/radio/dsbr100.c
@@ -452,7 +452,10 @@ static int vidioc_s_frequency(struct file *file, void *priv,
         if (radio->removed)
                 return -EIO;
 
+        mutex_lock(&radio->lock);
         radio->curfreq = f->frequency;
+        mutex_unlock(&radio->lock);
+
         retval = dsbr100_setfreq(radio, radio->curfreq);
         if (retval < 0)
                 dev_warn(&radio->usbdev->dev, "Set frequency failed\n");
@@ -603,7 +606,10 @@ static int usb_dsbr100_close(struct file *file)
         if (!radio)
                 return -ENODEV;
 
+        mutex_lock(&radio->lock);
         radio->users = 0;
+        mutex_unlock(&radio->lock);
+
         if (!radio->removed) {
                 retval = dsbr100_stop(radio);
                 if (retval < 0) {