V4L/DVB (7277): bttv: Re-enabling radio support requires the use of struct bttv_fh

A number of the radio tuner ioctl functions are shared with the TV
tuner, these functions require a struct bttv_fh data structure to be
allocated and initialized.

Signed-off-by: Robert Fitzsimons <robfitz@273k.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 16 insertions, 5 deletions

diff --git a/drivers/media/video/bt8xx/bttv-driver.c b/drivers/media/video/bt8xx/bttv-driver.c
index a080c149cc6c..fc3f57adb729 100644
--- a/drivers/media/video/bt8xx/bttv-driver.c
+++ b/drivers/media/video/bt8xx/bttv-driver.c
@@ -3415,6 +3415,7 @@ static int radio_open(struct inode *inode, struct file *file)
 {
         int minor = iminor(inode);
         struct bttv *btv = NULL;
+        struct bttv_fh *fh;
         unsigned int i;
 
         dprintk("bttv: open minor=%d\n",minor);
@@ -3429,12 +3430,19 @@ static int radio_open(struct inode *inode, struct file *file)
                 return -ENODEV;
 
         dprintk("bttv%d: open called (radio)\n",btv->c.nr);
+
+        /* allocate per filehandle data */
+        fh = kmalloc(sizeof(*fh), GFP_KERNEL);
+        if (NULL == fh)
+                return -ENOMEM;
+        file->private_data = fh;
+        *fh = btv->init;
+        v4l2_prio_open(&btv->prio, &fh->prio);
+
         mutex_lock(&btv->lock);
 
         btv->radio_user++;
 
-        file->private_data = btv;
-
         bttv_call_i2c_clients(btv,AUDC_SET_RADIO,NULL);
         audio_input(btv,TVAUDIO_INPUT_RADIO);
 
@@ -3444,7 +3452,8 @@ static int radio_open(struct inode *inode, struct file *file)
 
 static int radio_release(struct inode *inode, struct file *file)
 {
-        struct bttv *btv = file->private_data;
+        struct bttv_fh *fh = file->private_data;
+        struct bttv *btv = fh->btv;
         struct rds_command cmd;
 
         btv->radio_user--;
@@ -3569,7 +3578,8 @@ static int radio_g_input(struct file *filp, void *priv, unsigned int *i)
 static ssize_t radio_read(struct file *file, char __user *data,
                          size_t count, loff_t *ppos)
 {
-        struct bttv    *btv = file->private_data;
+        struct bttv_fh *fh = file->private_data;
+        struct bttv *btv = fh->btv;
         struct rds_command cmd;
         cmd.block_count = count/3;
         cmd.buffer = data;
@@ -3583,7 +3593,8 @@ static ssize_t radio_read(struct file *file, char __user *data,
 
 static unsigned int radio_poll(struct file *file, poll_table *wait)
 {
-        struct bttv    *btv = file->private_data;
+        struct bttv_fh *fh = file->private_data;
+        struct bttv *btv = fh->btv;
         struct rds_command cmd;
         cmd.instance = file;
         cmd.event_list = wait;