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V4L/DVB (10511): saa7134: get rid of KBL 

KBL is not needed on saa7134, so, let's remove it.

However, we should take some care to avoid opening the module while
initializing it. This issue exists with newer udev's that opens a device
as soon as the driver is registered. So, a proper lock is needed on
open.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2009-02-09 12:27:03 -03:00
parent 553d3c5067
commit befd6e645c
3 changed files with 30 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
drivers/media/video/saa7134/saa7134-core.c
View File

@ -86,8 +86,10 @@ MODULE_PARM_DESC(radio_nr, "radio device number");
MODULE_PARM_DESC(tuner, "tuner type");
MODULE_PARM_DESC(card, "card type");
static DEFINE_MUTEX(devlist_lock);
DEFINE_MUTEX(saa7134_devlist_lock);
EXPORT_SYMBOL(saa7134_devlist_lock);
LIST_HEAD(saa7134_devlist);
EXPORT_SYMBOL(saa7134_devlist);
static LIST_HEAD(mops_list);
static unsigned int saa7134_devcount;
@ -991,6 +993,18 @@ static int __devinit saa7134_initdev(struct pci_dev *pci_dev,
v4l2_prio_init(&dev->prio);
mutex_lock(&saa7134_devlist_lock);
list_for_each_entry(mops, &mops_list, next)
mpeg_ops_attach(mops, dev);
list_add_tail(&dev->devlist, &saa7134_devlist);
mutex_unlock(&saa7134_devlist_lock);
/* check for signal */
saa7134_irq_video_signalchange(dev);
if (TUNER_ABSENT != dev->tuner_type)
saa_call_all(dev, core, s_standby, 0);
/* register v4l devices */
if (saa7134_no_overlay > 0)
printk(KERN_INFO "%s: Overlay support disabled.\n", dev->name);
@ -1028,21 +1042,8 @@ static int __devinit saa7134_initdev(struct pci_dev *pci_dev,
/* everything worked */
saa7134_devcount++;
mutex_lock(&devlist_lock);
list_for_each_entry(mops, &mops_list, next)
mpeg_ops_attach(mops, dev);
list_add_tail(&dev->devlist,&saa7134_devlist);
mutex_unlock(&devlist_lock);
/* check for signal */
saa7134_irq_video_signalchange(dev);
if (saa7134_dmasound_init && !dev->dmasound.priv_data) {
if (saa7134_dmasound_init && !dev->dmasound.priv_data)
saa7134_dmasound_init(dev);
}
if (TUNER_ABSENT != dev->tuner_type)
saa_call_all(dev, core, s_standby, 0);
return 0;
@ -1093,11 +1094,11 @@ static void __devexit saa7134_finidev(struct pci_dev *pci_dev)
saa7134_hwfini(dev);
/* unregister */
mutex_lock(&devlist_lock);
mutex_lock(&saa7134_devlist_lock);
list_del(&dev->devlist);
list_for_each_entry(mops, &mops_list, next)
mpeg_ops_detach(mops, dev);
mutex_unlock(&devlist_lock);
mutex_unlock(&saa7134_devlist_lock);
saa7134_devcount--;
saa7134_i2c_unregister(dev);
@ -1254,11 +1255,11 @@ int saa7134_ts_register(struct saa7134_mpeg_ops *ops)
{
struct saa7134_dev *dev;
mutex_lock(&devlist_lock);
mutex_lock(&saa7134_devlist_lock);
list_for_each_entry(dev, &saa7134_devlist, devlist)
mpeg_ops_attach(ops, dev);
list_add_tail(&ops->next,&mops_list);
mutex_unlock(&devlist_lock);
mutex_unlock(&saa7134_devlist_lock);
return 0;
}
@ -1266,11 +1267,11 @@ void saa7134_ts_unregister(struct saa7134_mpeg_ops *ops)
{
struct saa7134_dev *dev;
mutex_lock(&devlist_lock);
mutex_lock(&saa7134_devlist_lock);
list_del(&ops->next);
list_for_each_entry(dev, &saa7134_devlist, devlist)
mpeg_ops_detach(ops, dev);
mutex_unlock(&devlist_lock);
mutex_unlock(&saa7134_devlist_lock);
}
EXPORT_SYMBOL(saa7134_ts_register);
@ -1314,7 +1315,6 @@ module_exit(saa7134_fini);
/* ----------------------------------------------------------- */
EXPORT_SYMBOL(saa7134_set_gpio);
EXPORT_SYMBOL(saa7134_devlist);
EXPORT_SYMBOL(saa7134_boards);
/* ----------------- for the DMA sound modules --------------- */

14
drivers/media/video/saa7134/saa7134-video.c
View File

@ -1335,7 +1335,7 @@ static int video_open(struct file *file)
enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
int radio = 0;
lock_kernel();
mutex_lock(&saa7134_devlist_lock);
list_for_each_entry(dev, &saa7134_devlist, devlist) {
if (dev->video_dev && (dev->video_dev->minor == minor))
goto found;
@ -1348,19 +1348,20 @@ static int video_open(struct file *file)
goto found;
}
}
unlock_kernel();
mutex_unlock(&saa7134_devlist_lock);
return -ENODEV;
found:
found:
mutex_unlock(&saa7134_devlist_lock);
dprintk("open minor=%d radio=%d type=%s\n",minor,radio,
v4l2_type_names[type]);
/* allocate + initialize per filehandle data */
fh = kzalloc(sizeof(*fh),GFP_KERNEL);
if (NULL == fh) {
unlock_kernel();
if (NULL == fh)
return -ENOMEM;
}
file->private_data = fh;
fh->dev = dev;
fh->radio = radio;
@ -1393,7 +1394,6 @@ static int video_open(struct file *file)
/* switch to video/vbi mode */
video_mux(dev,dev->ctl_input);
}
unlock_kernel();
return 0;
}

1
drivers/media/video/saa7134/saa7134.h
View File

@ -641,6 +641,7 @@ struct saa7134_dev {
/* saa7134-core.c */
extern struct list_head saa7134_devlist;
extern struct mutex saa7134_devlist_lock;
extern int saa7134_no_overlay;
void saa7134_track_gpio(struct saa7134_dev *dev, char *msg);