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>

diff --git a/drivers/media/radio/dsbr100.c b/drivers/media/radio/dsbr100.c
index 09988f020c48e61c98ea6061ec84ace7fa077a96..cc54ed4efc488fb49ad60102e1eb682e86b9ec35 100644 (file)
--- 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) {