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V4L/DVB (7121): Renames videobuf lock to vb_lock

Browse Source 
This helps to identify where vb_lock is being used, and find missusages of the
locks.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Mauro Carvalho Chehab 2008-01-31 13:57:53 -03:00
parent ce3a35d3c0
commit 64f9477f95
8 changed files with 84 additions and 86 deletions
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50
drivers/media/video/bt8xx/bttv-driver.c
View File

@ -2354,8 +2354,8 @@ static int setup_window(struct bttv_fh *fh, struct bttv *btv,
BUG();
}
mutex_lock(&fh->cap.lock);
kfree(fh->ov.clips);
mutex_lock(&fh->cap.vb_lock);
kfree(fh->ov.clips);
fh->ov.clips = clips;
fh->ov.nclips = n;
@ -2376,7 +2376,7 @@ static int setup_window(struct bttv_fh *fh, struct bttv *btv,
bttv_overlay_risc(btv, &fh->ov, fh->ovfmt, new);
retval = bttv_switch_overlay(btv,fh,new);
}
mutex_unlock(&fh->cap.lock);
mutex_unlock(&fh->cap.vb_lock);
return retval;
}
@ -2576,7 +2576,7 @@ static int bttv_s_fmt_cap(struct file *file, void *priv,
fmt = format_by_fourcc(f->fmt.pix.pixelformat);
/* update our state informations */
mutex_lock(&fh->cap.lock);
mutex_lock(&fh->cap.vb_lock);
fh->fmt = fmt;
fh->cap.field = f->fmt.pix.field;
fh->cap.last = V4L2_FIELD_NONE;
@ -2585,7 +2585,7 @@ static int bttv_s_fmt_cap(struct file *file, void *priv,
btv->init.fmt = fmt;
btv->init.width = f->fmt.pix.width;
btv->init.height = f->fmt.pix.height;
mutex_unlock(&fh->cap.lock);
mutex_unlock(&fh->cap.vb_lock);
return 0;
}
@ -2611,11 +2611,11 @@ static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
unsigned int i;
struct bttv_fh *fh = priv;
mutex_lock(&fh->cap.lock);
mutex_lock(&fh->cap.vb_lock);
retval = videobuf_mmap_setup(&fh->cap, gbuffers, gbufsize,
V4L2_MEMORY_MMAP);
if (retval < 0) {
mutex_unlock(&fh->cap.lock);
mutex_unlock(&fh->cap.vb_lock);
return retval;
}
@ -2627,7 +2627,7 @@ static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
for (i = 0; i < gbuffers; i++)
mbuf->offsets[i] = i * gbufsize;
mutex_unlock(&fh->cap.lock);
mutex_unlock(&fh->cap.vb_lock);
return 0;
}
#endif
@ -2756,7 +2756,7 @@ static int bttv_overlay(struct file *file, void *f, unsigned int on)
if (!check_alloc_btres(btv, fh, RESOURCE_OVERLAY))
return -EBUSY;
mutex_lock(&fh->cap.lock);
mutex_lock(&fh->cap.vb_lock);
if (on) {
fh->ov.tvnorm = btv->tvnorm;
new = videobuf_pci_alloc(sizeof(*new));
@ -2767,7 +2767,7 @@ static int bttv_overlay(struct file *file, void *f, unsigned int on)
/* switch over */
retval = bttv_switch_overlay(btv, fh, new);
mutex_unlock(&fh->cap.lock);
mutex_unlock(&fh->cap.vb_lock);
return retval;
}
@ -2806,7 +2806,7 @@ static int bttv_s_fbuf(struct file *file, void *f,
}
/* ok, accept it */
mutex_lock(&fh->cap.lock);
mutex_lock(&fh->cap.vb_lock);
btv->fbuf.base = fb->base;
btv->fbuf.fmt.width = fb->fmt.width;
btv->fbuf.fmt.height = fb->fmt.height;
@ -2838,7 +2838,7 @@ static int bttv_s_fbuf(struct file *file, void *f,
retval = bttv_switch_overlay(btv, fh, new);
}
}
mutex_unlock(&fh->cap.lock);
mutex_unlock(&fh->cap.vb_lock);
return retval;
}
@ -3090,7 +3090,7 @@ static int bttv_s_crop(struct file *file, void *f, struct v4l2_crop *crop)
fh->do_crop = 1;
mutex_lock(&fh->cap.lock);
mutex_lock(&fh->cap.vb_lock);
if (fh->width < c.min_scaled_width) {
fh->width = c.min_scaled_width;
@ -3108,7 +3108,7 @@ static int bttv_s_crop(struct file *file, void *f, struct v4l2_crop *crop)
btv->init.height = c.max_scaled_height;
}
mutex_unlock(&fh->cap.lock);
mutex_unlock(&fh->cap.vb_lock);
return 0;
}
@ -3177,30 +3177,25 @@ static unsigned int bttv_poll(struct file *file, poll_table *wait)
buf = list_entry(fh->cap.stream.next,struct bttv_buffer,vb.stream);
} else {
/* read() capture */
mutex_lock(&fh->cap.lock);
mutex_lock(&fh->cap.vb_lock);
if (NULL == fh->cap.read_buf) {
/* need to capture a new frame */
if (locked_btres(fh->btv,RESOURCE_VIDEO_STREAM)) {
mutex_unlock(&fh->cap.lock);
return POLLERR;
}
if (locked_btres(fh->btv,RESOURCE_VIDEO_STREAM))
goto err;
fh->cap.read_buf = videobuf_pci_alloc(fh->cap.msize);
if (NULL == fh->cap.read_buf) {
mutex_unlock(&fh->cap.lock);
return POLLERR;
}
if (NULL == fh->cap.read_buf)
goto err;
fh->cap.read_buf->memory = V4L2_MEMORY_USERPTR;
field = videobuf_next_field(&fh->cap);
if (0 != fh->cap.ops->buf_prepare(&fh->cap,fh->cap.read_buf,field)) {
kfree (fh->cap.read_buf);
fh->cap.read_buf = NULL;
mutex_unlock(&fh->cap.lock);
return POLLERR;
goto err;
}
fh->cap.ops->buf_queue(&fh->cap,fh->cap.read_buf);
fh->cap.read_off = 0;
}
mutex_unlock(&fh->cap.lock);
mutex_unlock(&fh->cap.vb_lock);
buf = (struct bttv_buffer*)fh->cap.read_buf;
}
@ -3209,6 +3204,9 @@ static unsigned int bttv_poll(struct file *file, poll_table *wait)
buf->vb.state == VIDEOBUF_ERROR)
return POLLIN|POLLRDNORM;
return 0;
err:
mutex_unlock(&fh->cap.vb_lock);
return POLLERR;
}
static int bttv_open(struct inode *inode, struct file *file)

4
drivers/media/video/bt8xx/bttv-vbi.c
View File

@ -352,13 +352,13 @@ int bttv_s_fmt_vbi(struct file *file, void *f, struct v4l2_format *frt)
because vbi_fmt.end counts field lines times two. */
end = max(frt->fmt.vbi.start[0], start1) * 2 + 2;
mutex_lock(&fh->vbi.lock);
mutex_lock(&fh->vbi.vb_lock);
fh->vbi_fmt.fmt = frt->fmt.vbi;
fh->vbi_fmt.tvnorm = tvnorm;
fh->vbi_fmt.end = end;
mutex_unlock(&fh->vbi.lock);
mutex_unlock(&fh->vbi.vb_lock);
rc = 0;

8
drivers/media/video/saa7134/saa7134-empress.c
View File

@ -87,7 +87,7 @@ static int ts_open(struct inode *inode, struct file *file)
dprintk("open minor=%d\n",minor);
err = -EBUSY;
if (!mutex_trylock(&dev->empress_tsq.lock))
if (!mutex_trylock(&dev->empress_tsq.vb_lock))
goto done;
if (dev->empress_users)
goto done_up;
@ -101,7 +101,7 @@ static int ts_open(struct inode *inode, struct file *file)
err = 0;
done_up:
mutex_unlock(&dev->empress_tsq.lock);
mutex_unlock(&dev->empress_tsq.vb_lock);
done:
return err;
}
@ -110,7 +110,7 @@ static int ts_release(struct inode *inode, struct file *file)
{
struct saa7134_dev *dev = file->private_data;
mutex_lock(&dev->empress_tsq.lock);
mutex_lock(&dev->empress_tsq.vb_lock);
videobuf_stop(&dev->empress_tsq);
videobuf_mmap_free(&dev->empress_tsq);
dev->empress_users--;
@ -122,7 +122,7 @@ static int ts_release(struct inode *inode, struct file *file)
saa_writeb(SAA7134_AUDIO_MUTE_CTRL,
saa_readb(SAA7134_AUDIO_MUTE_CTRL) | (1 << 6));
mutex_unlock(&dev->empress_tsq.lock);
mutex_unlock(&dev->empress_tsq.vb_lock);
return 0;
}

20
drivers/media/video/saa7134/saa7134-video.c
View File

@ -1414,21 +1414,17 @@ video_poll(struct file *file, struct poll_table_struct *wait)
if (!list_empty(&fh->cap.stream))
buf = list_entry(fh->cap.stream.next, struct videobuf_buffer, stream);
} else {
mutex_lock(&fh->cap.lock);
mutex_lock(&fh->cap.vb_lock);
if (UNSET == fh->cap.read_off) {
/* need to capture a new frame */
if (res_locked(fh->dev,RESOURCE_VIDEO)) {
mutex_unlock(&fh->cap.lock);
return POLLERR;
}
if (0 != fh->cap.ops->buf_prepare(&fh->cap,fh->cap.read_buf,fh->cap.field)) {
mutex_unlock(&fh->cap.lock);
return POLLERR;
}
if (res_locked(fh->dev,RESOURCE_VIDEO))
goto err;
if (0 != fh->cap.ops->buf_prepare(&fh->cap,fh->cap.read_buf,fh->cap.field))
goto err;
fh->cap.ops->buf_queue(&fh->cap,fh->cap.read_buf);
fh->cap.read_off = 0;
}
mutex_unlock(&fh->cap.lock);
mutex_unlock(&fh->cap.vb_lock);
buf = fh->cap.read_buf;
}
@ -1440,6 +1436,10 @@ video_poll(struct file *file, struct poll_table_struct *wait)
buf->state == VIDEOBUF_ERROR)
return POLLIN|POLLRDNORM;
return 0;
err:
mutex_unlock(&fh->cap.vb_lock);
return POLLERR;
}
static int video_release(struct inode *inode, struct file *file)

78
drivers/media/video/videobuf-core.c
View File

@ -147,7 +147,7 @@ void videobuf_queue_core_init(struct videobuf_queue *q,
/* Having implementations for abstract methods are mandatory */
BUG_ON(!q->int_ops);
mutex_init(&q->lock);
mutex_init(&q->vb_lock);
INIT_LIST_HEAD(&q->stream);
}
@ -189,7 +189,7 @@ int videobuf_queue_is_busy(struct videobuf_queue *q)
return 0;
}
/* Locking: Caller holds q->lock */
/* Locking: Caller holds q->vb_lock */
void videobuf_queue_cancel(struct videobuf_queue *q)
{
unsigned long flags = 0;
@ -220,7 +220,7 @@ void videobuf_queue_cancel(struct videobuf_queue *q)
/* --------------------------------------------------------------------- */
/* Locking: Caller holds q->lock */
/* Locking: Caller holds q->vb_lock */
enum v4l2_field videobuf_next_field(struct videobuf_queue *q)
{
enum v4l2_field field = q->field;
@ -239,7 +239,7 @@ enum v4l2_field videobuf_next_field(struct videobuf_queue *q)
return field;
}
/* Locking: Caller holds q->lock */
/* Locking: Caller holds q->vb_lock */
static void videobuf_status(struct videobuf_queue *q, struct v4l2_buffer *b,
struct videobuf_buffer *vb, enum v4l2_buf_type type)
{
@ -295,7 +295,7 @@ static void videobuf_status(struct videobuf_queue *q, struct v4l2_buffer *b,
b->sequence = vb->field_count >> 1;
}
/* Locking: Caller holds q->lock */
/* Locking: Caller holds q->vb_lock */
static int __videobuf_mmap_free(struct videobuf_queue *q)
{
int i;
@ -328,13 +328,13 @@ static int __videobuf_mmap_free(struct videobuf_queue *q)
int videobuf_mmap_free(struct videobuf_queue *q)
{
int ret;
mutex_lock(&q->lock);
mutex_lock(&q->vb_lock);
ret = __videobuf_mmap_free(q);
mutex_unlock(&q->lock);
mutex_unlock(&q->vb_lock);
return ret;
}
/* Locking: Caller holds q->lock */
/* Locking: Caller holds q->vb_lock */
static int __videobuf_mmap_setup(struct videobuf_queue *q,
unsigned int bcount, unsigned int bsize,
enum v4l2_memory memory)
@ -384,9 +384,9 @@ int videobuf_mmap_setup(struct videobuf_queue *q,
enum v4l2_memory memory)
{
int ret;
mutex_lock(&q->lock);
mutex_lock(&q->vb_lock);
ret = __videobuf_mmap_setup(q, bcount, bsize, memory);
mutex_unlock(&q->lock);
mutex_unlock(&q->vb_lock);
return ret;
}
@ -408,7 +408,7 @@ int videobuf_reqbufs(struct videobuf_queue *q,
return -EINVAL;
}
mutex_lock(&q->lock);
mutex_lock(&q->vb_lock);
if (req->type != q->type) {
dprintk(1, "reqbufs: queue type invalid\n");
retval = -EINVAL;
@ -444,7 +444,7 @@ int videobuf_reqbufs(struct videobuf_queue *q,
req->count = retval;
done:
mutex_unlock(&q->lock);
mutex_unlock(&q->vb_lock);
return retval;
}
@ -452,7 +452,7 @@ int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b)
{
int ret = -EINVAL;
mutex_lock(&q->lock);
mutex_lock(&q->vb_lock);
if (unlikely(b->type != q->type)) {
dprintk(1, "querybuf: Wrong type.\n");
goto done;
@ -470,7 +470,7 @@ int videobuf_querybuf(struct videobuf_queue *q, struct v4l2_buffer *b)
ret = 0;
done:
mutex_unlock(&q->lock);
mutex_unlock(&q->vb_lock);
return ret;
}
@ -487,7 +487,7 @@ int videobuf_qbuf(struct videobuf_queue *q,
if (b->memory == V4L2_MEMORY_MMAP)
down_read(&current->mm->mmap_sem);
mutex_lock(&q->lock);
mutex_lock(&q->vb_lock);
retval = -EBUSY;
if (q->reading) {
dprintk(1, "qbuf: Reading running...\n");
@ -573,7 +573,7 @@ int videobuf_qbuf(struct videobuf_queue *q,
retval = 0;
done:
mutex_unlock(&q->lock);
mutex_unlock(&q->vb_lock);
if (b->memory == V4L2_MEMORY_MMAP)
up_read(&current->mm->mmap_sem);
@ -589,7 +589,7 @@ int videobuf_dqbuf(struct videobuf_queue *q,
MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);
mutex_lock(&q->lock);
mutex_lock(&q->vb_lock);
retval = -EBUSY;
if (q->reading) {
dprintk(1, "dqbuf: Reading running...\n");
@ -632,7 +632,7 @@ int videobuf_dqbuf(struct videobuf_queue *q,
videobuf_status(q, b, buf, q->type);
done:
mutex_unlock(&q->lock);
mutex_unlock(&q->vb_lock);
return retval;
}
@ -642,7 +642,7 @@ int videobuf_streamon(struct videobuf_queue *q)
unsigned long flags = 0;
int retval;
mutex_lock(&q->lock);
mutex_lock(&q->vb_lock);
retval = -EBUSY;
if (q->reading)
goto done;
@ -659,11 +659,11 @@ int videobuf_streamon(struct videobuf_queue *q)
spin_unlock_irqrestore(q->irqlock, flags);
done:
mutex_unlock(&q->lock);
mutex_unlock(&q->vb_lock);
return retval;
}
/* Locking: Caller holds q->lock */
/* Locking: Caller holds q->vb_lock */
static int __videobuf_streamoff(struct videobuf_queue *q)
{
if (!q->streaming)
@ -679,14 +679,14 @@ int videobuf_streamoff(struct videobuf_queue *q)
{
int retval;
mutex_lock(&q->lock);
mutex_lock(&q->vb_lock);
retval = __videobuf_streamoff(q);
mutex_unlock(&q->lock);
mutex_unlock(&q->vb_lock);
return retval;
}
/* Locking: Caller holds q->lock */
/* Locking: Caller holds q->vb_lock */
static ssize_t videobuf_read_zerocopy(struct videobuf_queue *q,
char __user *data,
size_t count, loff_t *ppos)
@ -745,7 +745,7 @@ ssize_t videobuf_read_one(struct videobuf_queue *q,
MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);
mutex_lock(&q->lock);
mutex_lock(&q->vb_lock);
nbufs = 1; size = 0;
q->ops->buf_setup(q, &nbufs, &size);
@ -817,11 +817,11 @@ ssize_t videobuf_read_one(struct videobuf_queue *q,
}
done:
mutex_unlock(&q->lock);
mutex_unlock(&q->vb_lock);
return retval;
}
/* Locking: Caller holds q->lock */
/* Locking: Caller holds q->vb_lock */
static int __videobuf_read_start(struct videobuf_queue *q)
{
enum v4l2_field field;
@ -882,23 +882,23 @@ int videobuf_read_start(struct videobuf_queue *q)
{
int rc;
mutex_lock(&q->lock);
mutex_lock(&q->vb_lock);
rc = __videobuf_read_start(q);
mutex_unlock(&q->lock);
mutex_unlock(&q->vb_lock);
return rc;
}
void videobuf_read_stop(struct videobuf_queue *q)
{
mutex_lock(&q->lock);
mutex_lock(&q->vb_lock);
__videobuf_read_stop(q);
mutex_unlock(&q->lock);
mutex_unlock(&q->vb_lock);
}
void videobuf_stop(struct videobuf_queue *q)
{
mutex_lock(&q->lock);
mutex_lock(&q->vb_lock);
if (q->streaming)
__videobuf_streamoff(q);
@ -906,7 +906,7 @@ void videobuf_stop(struct videobuf_queue *q)
if (q->reading)
__videobuf_read_stop(q);
mutex_unlock(&q->lock);
mutex_unlock(&q->vb_lock);
}
@ -920,7 +920,7 @@ ssize_t videobuf_read_stream(struct videobuf_queue *q,
MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);
dprintk(2, "%s\n", __FUNCTION__);
mutex_lock(&q->lock);
mutex_lock(&q->vb_lock);
retval = -EBUSY;
if (q->streaming)
goto done;
@ -980,7 +980,7 @@ ssize_t videobuf_read_stream(struct videobuf_queue *q,
}
done:
mutex_unlock(&q->lock);
mutex_unlock(&q->vb_lock);
return retval;
}
@ -991,7 +991,7 @@ unsigned int videobuf_poll_stream(struct file *file,
struct videobuf_buffer *buf = NULL;
unsigned int rc = 0;
mutex_lock(&q->lock);
mutex_lock(&q->vb_lock);
if (q->streaming) {
if (!list_empty(&q->stream))
buf = list_entry(q->stream.next,
@ -1019,7 +1019,7 @@ unsigned int videobuf_poll_stream(struct file *file,
buf->state == VIDEOBUF_ERROR)
rc = POLLIN|POLLRDNORM;
}
mutex_unlock(&q->lock);
mutex_unlock(&q->vb_lock);
return rc;
}
@ -1030,10 +1030,10 @@ int videobuf_mmap_mapper(struct videobuf_queue *q,
MAGIC_CHECK(q->int_ops->magic, MAGIC_QTYPE_OPS);
mutex_lock(&q->lock);
mutex_lock(&q->vb_lock);
retval = CALL(q, mmap_mapper, q, vma);
q->is_mmapped = 1;
mutex_unlock(&q->lock);
mutex_unlock(&q->vb_lock);
return retval;
}

4
drivers/media/video/videobuf-dma-sg.c
View File

@ -356,7 +356,7 @@ videobuf_vm_close(struct vm_area_struct *vma)
map->count--;
if (0 == map->count) {
dprintk(1,"munmap %p q=%p\n",map,q);
mutex_lock(&q->lock);
mutex_lock(&q->vb_lock);
for (i = 0; i < VIDEO_MAX_FRAME; i++) {
if (NULL == q->bufs[i])
continue;
@ -373,7 +373,7 @@ videobuf_vm_close(struct vm_area_struct *vma)
q->bufs[i]->baddr = 0;
q->ops->buf_release(q,q->bufs[i]);
}
mutex_unlock(&q->lock);
mutex_unlock(&q->vb_lock);
kfree(map);
}
return;

4
drivers/media/video/videobuf-vmalloc.c
View File

@ -70,7 +70,7 @@ videobuf_vm_close(struct vm_area_struct *vma)
map->count--;
if (0 == map->count) {
dprintk(1,"munmap %p q=%p\n",map,q);
mutex_lock(&q->lock);
mutex_lock(&q->vb_lock);
for (i = 0; i < VIDEO_MAX_FRAME; i++) {
if (NULL == q->bufs[i])
continue;
@ -83,7 +83,7 @@ videobuf_vm_close(struct vm_area_struct *vma)
q->bufs[i]->map = NULL;
q->bufs[i]->baddr = 0;
}
mutex_unlock(&q->lock);
mutex_unlock(&q->vb_lock);
kfree(map);
}
return;

2
include/media/videobuf-core.h
View File

@ -149,7 +149,7 @@ struct videobuf_qtype_ops {
};
struct videobuf_queue {
struct mutex lock;
struct mutex vb_lock;
spinlock_t *irqlock;
void *dev; /* on pci, points to struct pci_dev */