[media] tea575x: allow multiple opens (6a529c1a) · Commits · 戴 / test

include/sound/tea575x-tuner.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -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];

+3 −19

Original line number	Diff line number	Diff line
		@@ -282,26 +282,9 @@ static int vidioc_s_input(struct file filp, void priv, unsigned int i)
		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 *tea)
		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;