Signed-off-by: David Ellingsworth <david@xxxxxxxxxxxxxxxxx>
---
drivers/media/radio/dsbr100.c | 77 +++++++++++++++++-----------------------
1 files changed, 33 insertions(+), 44 deletions(-)
diff --git a/drivers/media/radio/dsbr100.c b/drivers/media/radio/dsbr100.c
index ed9cd7a..673eda8 100644
--- a/drivers/media/radio/dsbr100.c
+++ b/drivers/media/radio/dsbr100.c
@@ -182,7 +182,7 @@ static int dsbr100_start(struct dsbr100_device *radio)
int retval;
int request;
- mutex_lock(&radio->lock);
+ BUG_ON(!mutex_is_locked(&radio->lock));
retval = usb_control_msg(radio->usbdev,
usb_rcvctrlpipe(radio->usbdev, 0),
@@ -207,11 +207,9 @@ static int dsbr100_start(struct dsbr100_device *radio)
}
radio->status = STARTED;
- mutex_unlock(&radio->lock);
return (radio->transfer_buffer)[0];
usb_control_msg_failed:
- mutex_unlock(&radio->lock);
dev_err(&radio->usbdev->dev,
"%s - usb_control_msg returned %i, request %i\n",
__func__, retval, request);
@@ -225,7 +223,7 @@ static int dsbr100_stop(struct dsbr100_device *radio)
int retval;
int request;
- mutex_lock(&radio->lock);
+ BUG_ON(!mutex_is_locked(&radio->lock));
retval = usb_control_msg(radio->usbdev,
usb_rcvctrlpipe(radio->usbdev, 0),
@@ -250,11 +248,9 @@ static int dsbr100_stop(struct dsbr100_device *radio)
}
radio->status = STOPPED;
- mutex_unlock(&radio->lock);
return (radio->transfer_buffer)[0];
usb_control_msg_failed:
- mutex_unlock(&radio->lock);
dev_err(&radio->usbdev->dev,
"%s - usb_control_msg returned %i, request %i\n",
__func__, retval, request);
@@ -269,7 +265,7 @@ static int dsbr100_setfreq(struct dsbr100_device *radio)
int request;
int freq = (radio->curfreq / 16 * 80) / 1000 + 856;
- mutex_lock(&radio->lock);
+ BUG_ON(!mutex_is_locked(&radio->lock));
retval = usb_control_msg(radio->usbdev,
usb_rcvctrlpipe(radio->usbdev, 0),
@@ -306,12 +302,10 @@ static int dsbr100_setfreq(struct dsbr100_device *radio)
}
radio->stereo = !((radio->transfer_buffer)[0] & 0x01);
- mutex_unlock(&radio->lock);
return (radio->transfer_buffer)[0];
usb_control_msg_failed:
radio->stereo = -1;
- mutex_unlock(&radio->lock);
dev_err(&radio->usbdev->dev,
"%s - usb_control_msg returned %i, request %i\n",
__func__, retval, request);
@@ -324,7 +318,7 @@ static void dsbr100_getstat(struct dsbr100_device *radio)
{
int retval;
- mutex_lock(&radio->lock);
+ BUG_ON(!mutex_is_locked(&radio->lock));
retval = usb_control_msg(radio->usbdev,
usb_rcvctrlpipe(radio->usbdev, 0),
@@ -340,8 +334,6 @@ static void dsbr100_getstat(struct dsbr100_device *radio)
} else {
radio->stereo = !(radio->transfer_buffer[0] & 0x01);
}
-
- mutex_unlock(&radio->lock);
}
/* USB subsystem interface begins here */
@@ -385,10 +377,6 @@ static int vidioc_g_tuner(struct file *file, void *priv,
{
struct dsbr100_device *radio = video_drvdata(file);
- /* safety check */
- if (radio->removed)
- return -EIO;
-
if (v->index > 0)
return -EINVAL;
@@ -410,12 +398,6 @@ static int vidioc_g_tuner(struct file *file, void *priv,
static int vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
- struct dsbr100_device *radio = video_drvdata(file);
-
- /* safety check */
- if (radio->removed)
- return -EIO;
-
if (v->index > 0)
return -EINVAL;
@@ -428,17 +410,12 @@ static int vidioc_s_frequency(struct file *file, void *priv,
struct dsbr100_device *radio = video_drvdata(file);
int retval;
- /* safety check */
- if (radio->removed)
- return -EIO;
-
- mutex_lock(&radio->lock);
radio->curfreq = f->frequency;
- mutex_unlock(&radio->lock);
retval = dsbr100_setfreq(radio);
if (retval < 0)
dev_warn(&radio->usbdev->dev, "Set frequency failed\n");
+
return 0;
}
@@ -447,10 +424,6 @@ static int vidioc_g_frequency(struct file *file, void *priv,
{
struct dsbr100_device *radio = video_drvdata(file);
- /* safety check */
- if (radio->removed)
- return -EIO;
-
f->type = V4L2_TUNER_RADIO;
f->frequency = radio->curfreq;
return 0;
@@ -472,10 +445,6 @@ static int vidioc_g_ctrl(struct file *file, void *priv,
{
struct dsbr100_device *radio = video_drvdata(file);
- /* safety check */
- if (radio->removed)
- return -EIO;
-
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
ctrl->value = radio->status;
@@ -490,10 +459,6 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
struct dsbr100_device *radio = video_drvdata(file);
int retval;
- /* safety check */
- if (radio->removed)
- return -EIO;
-
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
if (ctrl->value) {
@@ -513,6 +478,7 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
}
return 0;
}
+
return -EINVAL;
}
@@ -548,12 +514,34 @@ static int vidioc_s_audio(struct file *file, void *priv,
return 0;
}
+static long usb_dsbr100_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ struct dsbr100_device *radio = video_drvdata(file);
+ long retval = 0;
+
+ mutex_lock(&radio->lock);
+
+ if (radio->removed) {
+ retval = -EIO;
+ goto unlock;
+ }
+
+ retval = video_ioctl2(file, cmd, arg);
+
+unlock:
+ mutex_unlock(&radio->lock);
+ return retval;
+}
+
/* Suspend device - stop device. */
static int usb_dsbr100_suspend(struct usb_interface *intf, pm_message_t message)
{
struct dsbr100_device *radio = usb_get_intfdata(intf);
int retval;
+ mutex_lock(&radio->lock);
+
if (radio->status == STARTED) {
retval = dsbr100_stop(radio);
if (retval < 0)
@@ -564,12 +552,10 @@ static int usb_dsbr100_suspend(struct usb_interface *intf, pm_message_t message)
* we set status equal to STARTED.
* On resume we will check status and run radio if needed.
*/
-
- mutex_lock(&radio->lock);
radio->status = STARTED;
- mutex_unlock(&radio->lock);
}
+ mutex_unlock(&radio->lock);
dev_info(&intf->dev, "going into suspend..\n");
return 0;
@@ -581,12 +567,15 @@ static int usb_dsbr100_resume(struct usb_interface *intf)
struct dsbr100_device *radio = usb_get_intfdata(intf);
int retval;
+ mutex_lock(&radio->lock);
+
if (radio->status == STARTED) {
retval = dsbr100_start(radio);
if (retval < 0)
dev_warn(&intf->dev, "dsbr100_start failed\n");
}
+ mutex_unlock(&radio->lock);
dev_info(&intf->dev, "coming out of suspend..\n");
return 0;
@@ -605,7 +594,7 @@ static void usb_dsbr100_video_device_release(struct video_device *videodev)
/* File system interface */
static const struct v4l2_file_operations usb_dsbr100_fops = {
.owner = THIS_MODULE,
- .ioctl = video_ioctl2,
+ .unlocked_ioctl = usb_dsbr100_ioctl,
};
static const struct v4l2_ioctl_ops usb_dsbr100_ioctl_ops = {
--
1.7.1
--
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