From 7d43cd53c851e3cf04d73108d4e7e25a1104c6f5 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sat, 23 Aug 2008 05:31:47 -0300 Subject: [PATCH] V4L/DVB (8780): v4l: replace the last uses of video_exclusive_open/release Handle the video_exclusive_open/release functionality inside the driver. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/arv.c | 19 +++++++++++--- drivers/media/video/bw-qcam.c | 21 +++++++++++++-- drivers/media/video/bw-qcam.h | 1 + drivers/media/video/c-qcam.c | 22 ++++++++++++++-- drivers/media/video/meye.c | 16 ++++-------- drivers/media/video/meye.h | 1 + drivers/media/video/pms.c | 22 ++++++++++++++-- drivers/media/video/saa5246a.c | 30 ++++++---------------- drivers/media/video/saa5249.c | 47 +++++++++++++--------------------- drivers/media/video/w9966.c | 22 ++++++++++++++-- 10 files changed, 128 insertions(+), 73 deletions(-) diff --git a/drivers/media/video/arv.c b/drivers/media/video/arv.c index 9e436ad3d34..0d4f9b68345 100644 --- a/drivers/media/video/arv.c +++ b/drivers/media/video/arv.c @@ -116,6 +116,7 @@ struct ar_device { int width, height; int frame_bytes, line_bytes; wait_queue_head_t wait; + unsigned long in_use; struct mutex lock; }; @@ -742,10 +743,23 @@ void ar_release(struct video_device *vfd) * Video4Linux Module functions * ****************************************************************************/ +static struct ar_device ardev; + +static int ar_exclusive_open(struct inode *inode, struct file *file) +{ + return test_and_set_bit(0, &ardev.in_use) ? -EBUSY : 0; +} + +static int ar_exclusive_release(struct inode *inode, struct file *file) +{ + clear_bit(0, &ardev.in_use); + return 0; +} + static const struct file_operations ar_fops = { .owner = THIS_MODULE, - .open = video_exclusive_open, - .release = video_exclusive_release, + .open = ar_exclusive_open, + .release = ar_exclusive_release, .read = ar_read, .ioctl = ar_ioctl, #ifdef CONFIG_COMPAT @@ -762,7 +776,6 @@ static struct video_device ar_template = { }; #define ALIGN4(x) ((((int)(x)) & 0x3) == 0) -static struct ar_device ardev; static int __init ar_init(void) { diff --git a/drivers/media/video/bw-qcam.c b/drivers/media/video/bw-qcam.c index 01f07707827..e8e1bb122b5 100644 --- a/drivers/media/video/bw-qcam.c +++ b/drivers/media/video/bw-qcam.c @@ -894,10 +894,27 @@ static ssize_t qcam_read(struct file *file, char __user *buf, return len; } +static int qcam_exclusive_open(struct inode *inode, struct file *file) +{ + struct video_device *dev = video_devdata(file); + struct qcam_device *qcam = (struct qcam_device *)dev; + + return test_and_set_bit(0, &qcam->in_use) ? -EBUSY : 0; +} + +static int qcam_exclusive_release(struct inode *inode, struct file *file) +{ + struct video_device *dev = video_devdata(file); + struct qcam_device *qcam = (struct qcam_device *)dev; + + clear_bit(0, &qcam->in_use); + return 0; +} + static const struct file_operations qcam_fops = { .owner = THIS_MODULE, - .open = video_exclusive_open, - .release = video_exclusive_release, + .open = qcam_exclusive_open, + .release = qcam_exclusive_release, .ioctl = qcam_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = v4l_compat_ioctl32, diff --git a/drivers/media/video/bw-qcam.h b/drivers/media/video/bw-qcam.h index 6701dafbc0d..8a60c5de093 100644 --- a/drivers/media/video/bw-qcam.h +++ b/drivers/media/video/bw-qcam.h @@ -65,4 +65,5 @@ struct qcam_device { int top, left; int status; unsigned int saved_bits; + unsigned long in_use; }; diff --git a/drivers/media/video/c-qcam.c b/drivers/media/video/c-qcam.c index 7f6c6b4bec1..2196c1dc5ae 100644 --- a/drivers/media/video/c-qcam.c +++ b/drivers/media/video/c-qcam.c @@ -51,6 +51,7 @@ struct qcam_device { int contrast, brightness, whitebal; int top, left; unsigned int bidirectional; + unsigned long in_use; struct mutex lock; }; @@ -687,11 +688,28 @@ static ssize_t qcam_read(struct file *file, char __user *buf, return len; } +static int qcam_exclusive_open(struct inode *inode, struct file *file) +{ + struct video_device *dev = video_devdata(file); + struct qcam_device *qcam = (struct qcam_device *)dev; + + return test_and_set_bit(0, &qcam->in_use) ? -EBUSY : 0; +} + +static int qcam_exclusive_release(struct inode *inode, struct file *file) +{ + struct video_device *dev = video_devdata(file); + struct qcam_device *qcam = (struct qcam_device *)dev; + + clear_bit(0, &qcam->in_use); + return 0; +} + /* video device template */ static const struct file_operations qcam_fops = { .owner = THIS_MODULE, - .open = video_exclusive_open, - .release = video_exclusive_release, + .open = qcam_exclusive_open, + .release = qcam_exclusive_release, .ioctl = qcam_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = v4l_compat_ioctl32, diff --git a/drivers/media/video/meye.c b/drivers/media/video/meye.c index 102a5b9cfd1..6418f4a78f2 100644 --- a/drivers/media/video/meye.c +++ b/drivers/media/video/meye.c @@ -843,21 +843,16 @@ again: static int meye_open(struct inode *inode, struct file *file) { - int i, err; + int i; - lock_kernel(); - err = video_exclusive_open(inode, file); - if (err < 0) { - unlock_kernel(); - return err; - } + if (test_and_set_bit(0, &meye.in_use)) + return -EBUSY; mchip_hic_stop(); if (mchip_dma_alloc()) { printk(KERN_ERR "meye: mchip framebuffer allocation failed\n"); - video_exclusive_release(inode, file); - unlock_kernel(); + clear_bit(0, &meye.in_use); return -ENOBUFS; } @@ -865,7 +860,6 @@ static int meye_open(struct inode *inode, struct file *file) meye.grab_buffer[i].state = MEYE_BUF_UNUSED; kfifo_reset(meye.grabq); kfifo_reset(meye.doneq); - unlock_kernel(); return 0; } @@ -873,7 +867,7 @@ static int meye_release(struct inode *inode, struct file *file) { mchip_hic_stop(); mchip_dma_free(); - video_exclusive_release(inode, file); + clear_bit(0, &meye.in_use); return 0; } diff --git a/drivers/media/video/meye.h b/drivers/media/video/meye.h index d535748df44..5f70a106ba2 100644 --- a/drivers/media/video/meye.h +++ b/drivers/media/video/meye.h @@ -311,6 +311,7 @@ struct meye { struct video_device *video_dev; /* video device parameters */ struct video_picture picture; /* video picture parameters */ struct meye_params params; /* additional parameters */ + unsigned long in_use; /* set to 1 if the device is in use */ #ifdef CONFIG_PM u8 pm_mchip_mode; /* old mchip mode */ #endif diff --git a/drivers/media/video/pms.c b/drivers/media/video/pms.c index 7c84f795db5..b39794f0baf 100644 --- a/drivers/media/video/pms.c +++ b/drivers/media/video/pms.c @@ -47,6 +47,7 @@ struct pms_device struct video_picture picture; int height; int width; + unsigned long in_use; struct mutex lock; }; @@ -881,10 +882,27 @@ static ssize_t pms_read(struct file *file, char __user *buf, return len; } +static int pms_exclusive_open(struct inode *inode, struct file *file) +{ + struct video_device *v = video_devdata(file); + struct pms_device *pd = (struct pms_device *)v; + + return test_and_set_bit(0, &pd->in_use) ? -EBUSY : 0; +} + +static int pms_exclusive_release(struct inode *inode, struct file *file) +{ + struct video_device *v = video_devdata(file); + struct pms_device *pd = (struct pms_device *)v; + + clear_bit(0, &pd->in_use); + return 0; +} + static const struct file_operations pms_fops = { .owner = THIS_MODULE, - .open = video_exclusive_open, - .release = video_exclusive_release, + .open = pms_exclusive_open, + .release = pms_exclusive_release, .ioctl = pms_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = v4l_compat_ioctl32, diff --git a/drivers/media/video/saa5246a.c b/drivers/media/video/saa5246a.c index e2c538ee88f..5f5aa2063e0 100644 --- a/drivers/media/video/saa5246a.c +++ b/drivers/media/video/saa5246a.c @@ -61,6 +61,7 @@ struct saa5246a_device u8 pgbuf[NUM_DAUS][VTX_VIRTUALSIZE]; int is_searching[NUM_DAUS]; struct i2c_client *client; + unsigned long in_use; struct mutex lock; }; @@ -736,22 +737,14 @@ static int saa5246a_open(struct inode *inode, struct file *file) { struct video_device *vd = video_devdata(file); struct saa5246a_device *t = vd->priv; - int err; - lock_kernel(); - err = video_exclusive_open(inode,file); - if (err < 0) { - unlock_kernel(); - return err; - } + if (t->client == NULL) + return -ENODEV; - if (t->client==NULL) { - err = -ENODEV; - goto fail; - } + if (test_and_set_bit(0, &t->in_use)) + return -EBUSY; if (i2c_senddata(t, SAA5246A_REGISTER_R0, - R0_SELECT_R11 | R0_PLL_TIME_CONSTANT_LONG | R0_ENABLE_nODD_EVEN_OUTPUT | @@ -777,17 +770,10 @@ static int saa5246a_open(struct inode *inode, struct file *file) COMMAND_END)) { - err = -EIO; - goto fail; + clear_bit(0, &t->in_use); + return -EIO; } - unlock_kernel(); - return 0; - -fail: - video_exclusive_release(inode,file); - unlock_kernel(); - return err; } static int saa5246a_release(struct inode *inode, struct file *file) @@ -806,7 +792,7 @@ static int saa5246a_release(struct inode *inode, struct file *file) R1_VCS_TO_SCS, COMMAND_END); - video_exclusive_release(inode,file); + clear_bit(0, &t->in_use); return 0; } diff --git a/drivers/media/video/saa5249.c b/drivers/media/video/saa5249.c index 96c0fdf1a05..dfd8a9338c5 100644 --- a/drivers/media/video/saa5249.c +++ b/drivers/media/video/saa5249.c @@ -110,6 +110,7 @@ struct saa5249_device int disp_mode; int virtual_mode; struct i2c_client *client; + unsigned long in_use; struct mutex lock; }; @@ -631,34 +632,27 @@ static int saa5249_ioctl(struct inode *inode, struct file *file, static int saa5249_open(struct inode *inode, struct file *file) { struct video_device *vd = video_devdata(file); - struct saa5249_device *t=vd->priv; - int err,pgbuf; + struct saa5249_device *t = vd->priv; + int pgbuf; - lock_kernel(); - err = video_exclusive_open(inode,file); - if (err < 0) { - unlock_kernel(); - return err; - } + if (t->client == NULL) + return -ENODEV; - if (t->client==NULL) { - err = -ENODEV; - goto fail; - } + if (test_and_set_bit(0, &t->in_use)) + return -EBUSY; - if (i2c_senddata(t, 0, 0, -1) || /* Select R11 */ - /* Turn off parity checks (we do this ourselves) */ + if (i2c_senddata(t, 0, 0, -1) || /* Select R11 */ + /* Turn off parity checks (we do this ourselves) */ i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) || - /* Display TV-picture, no virtual rows */ - i2c_senddata(t, 4, NUM_DAUS, disp_modes[t->disp_mode][1], disp_modes[t->disp_mode][2], 7, -1)) /* Set display to page 4 */ - + /* Display TV-picture, no virtual rows */ + i2c_senddata(t, 4, NUM_DAUS, disp_modes[t->disp_mode][1], disp_modes[t->disp_mode][2], 7, -1)) + /* Set display to page 4 */ { - err = -EIO; - goto fail; + clear_bit(0, &t->in_use); + return -EIO; } - for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++) - { + for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++) { memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf)); memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs)); memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat)); @@ -668,13 +662,7 @@ static int saa5249_open(struct inode *inode, struct file *file) t->is_searching[pgbuf] = false; } t->virtual_mode = false; - unlock_kernel(); return 0; - - fail: - video_exclusive_release(inode,file); - unlock_kernel(); - return err; } @@ -682,10 +670,11 @@ static int saa5249_open(struct inode *inode, struct file *file) static int saa5249_release(struct inode *inode, struct file *file) { struct video_device *vd = video_devdata(file); - struct saa5249_device *t=vd->priv; + struct saa5249_device *t = vd->priv; + i2c_senddata(t, 1, 0x20, -1); /* Turn off CCT */ i2c_senddata(t, 5, 3, 3, -1); /* Turn off TV-display */ - video_exclusive_release(inode,file); + clear_bit(0, &t->in_use); return 0; } diff --git a/drivers/media/video/w9966.c b/drivers/media/video/w9966.c index 2ff00bc5ad6..c635cffb1fb 100644 --- a/drivers/media/video/w9966.c +++ b/drivers/media/video/w9966.c @@ -113,6 +113,7 @@ struct w9966_dev { signed char contrast; signed char color; signed char hue; + unsigned long in_use; }; /* @@ -184,10 +185,27 @@ static int w9966_v4l_ioctl(struct inode *inode, struct file *file, static ssize_t w9966_v4l_read(struct file *file, char __user *buf, size_t count, loff_t *ppos); +static int w9966_exclusive_open(struct inode *inode, struct file *file) +{ + struct video_device *vdev = video_devdata(file); + struct w9966_dev *cam = vdev->priv; + + return test_and_set_bit(0, &cam->in_use) ? -EBUSY : 0; +} + +static int w9966_exclusive_release(struct inode *inode, struct file *file) +{ + struct video_device *vdev = video_devdata(file); + struct w9966_dev *cam = vdev->priv; + + clear_bit(0, &cam->in_use); + return 0; +} + static const struct file_operations w9966_fops = { .owner = THIS_MODULE, - .open = video_exclusive_open, - .release = video_exclusive_release, + .open = w9966_exclusive_open, + .release = w9966_exclusive_release, .ioctl = w9966_v4l_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = v4l_compat_ioctl32, -- 2.41.1