提交 9c8e0a26 编写于 作者: F Frederic CAND 提交者: Mauro Carvalho Chehab

V4L/DVB (9496): cx88-blackbird: bugfix: cx88-blackbird-mpeg-users

Allows multiple access to the mpeg device
Signed-off-by: NFrederic CAND <frederic.cand@anevia.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
上级 a2482377
......@@ -1078,7 +1078,7 @@ static int mpeg_open(struct inode *inode, struct file *file)
}
}
if (blackbird_initialize_codec(dev) < 0) {
if (!atomic_read(&dev->core->mpeg_users) && blackbird_initialize_codec(dev) < 0) {
if (drv)
drv->request_release(drv);
unlock_kernel();
......@@ -1109,6 +1109,8 @@ static int mpeg_open(struct inode *inode, struct file *file)
fh->mpegq.field);
unlock_kernel();
atomic_inc(&dev->core->mpeg_users);
return 0;
}
......@@ -1118,7 +1120,7 @@ static int mpeg_release(struct inode *inode, struct file *file)
struct cx8802_dev *dev = fh->dev;
struct cx8802_driver *drv = NULL;
if (dev->mpeg_active)
if (dev->mpeg_active && atomic_read(&dev->core->mpeg_users) == 1)
blackbird_stop_codec(dev);
cx8802_cancel_buffers(fh->dev);
......@@ -1138,6 +1140,8 @@ static int mpeg_release(struct inode *inode, struct file *file)
if (drv)
drv->request_release(drv);
atomic_dec(&dev->core->mpeg_users);
return 0;
}
......
......@@ -352,6 +352,7 @@ struct cx88_core {
/* various v4l controls */
u32 freq;
atomic_t users;
atomic_t mpeg_users;
/* cx88-video needs to access cx8802 for hybrid tuner pll access. */
struct cx8802_dev *dvbdev;
......
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