Change locking to allow tea575x-radio device to be opened multiple times.

Signed-off-by: Ondrej Zary linux@rainbow-software.org

--- linux-2.6.39-rc2-/include/sound/tea575x-tuner.h 2011-06-11 15:21:50.000000000 +0200 +++ linux-2.6.39-rc2/include/sound/tea575x-tuner.h 2011-06-11 14:50:55.000000000 +0200 @@ -49,7 +49,7 @@ struct snd_tea575x { bool tuned; /* tuned to a station */ unsigned int val; /* hw value */ unsigned long freq; /* frequency */ - unsigned long in_use; /* set if the device is in use */ + struct mutex mutex; struct snd_tea575x_ops *ops; void *private_data; u8 card[32]; --- linux-2.6.39-rc2-/sound/i2c/other/tea575x-tuner.c 2011-06-11 15:21:50.000000000 +0200 +++ linux-2.6.39-rc2/sound/i2c/other/tea575x-tuner.c 2011-06-11 14:57:28.000000000 +0200 @@ -282,26 +282,9 @@ static int vidioc_s_input(struct file *f return 0; }

-static int snd_tea575x_exclusive_open(struct file *file) -{ - struct snd_tea575x *tea = video_drvdata(file); - - return test_and_set_bit(0, &tea->in_use) ? -EBUSY : 0; -} - -static int snd_tea575x_exclusive_release(struct file *file) -{ - struct snd_tea575x *tea = video_drvdata(file); - - clear_bit(0, &tea->in_use); - return 0; -} - static const struct v4l2_file_operations tea575x_fops = { .owner = THIS_MODULE, - .open = snd_tea575x_exclusive_open, - .release = snd_tea575x_exclusive_release, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, };

static const struct v4l2_ioctl_ops tea575x_ioctl_ops = { @@ -340,13 +323,14 @@ int snd_tea575x_init(struct snd_tea575x if (snd_tea575x_read(tea) != 0x55AA) return -ENODEV;

- tea->in_use = 0; tea->val = TEA575X_BIT_BAND_FM | TEA575X_BIT_SEARCH_10_40; tea->freq = 90500 * 16; /* 90.5Mhz default */ snd_tea575x_set_freq(tea);

tea->vd = tea575x_radio; video_set_drvdata(&tea->vd, tea); + mutex_init(&tea->mutex); + tea->vd.lock = &tea->mutex;

v4l2_ctrl_handler_init(&tea->ctrl_handler, 1); tea->vd.ctrl_handler = &tea->ctrl_handler;