saa7134: get rid of KBL

From: Mauro Carvalho Chehab <mchehab@redhat.com>

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>

3 files changed, 30 insertions, 29 deletions

diff --git a/linux/drivers/media/video/saa7134/saa7134-core.c b/linux/drivers/media/video/saa7134/saa7134-core.c
index 78b5c8f3c..d499064ee 100644
--- a/linux/drivers/media/video/saa7134/saa7134-core.c
+++ b/linux/drivers/media/video/saa7134/saa7134-core.c
@@ -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;
 
@@ -1052,6 +1054,18 @@ 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);
@@ -1089,21 +1103,8 @@ 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;
 
@@ -1154,11 +1155,11 @@ 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);
@@ -1321,11 +1322,11 @@ 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;
 }
 
@@ -1333,11 +1334,11 @@ 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);
@@ -1381,7 +1382,6 @@ module_exit(saa7134_fini);
 /* ----------------------------------------------------------- */
 
 EXPORT_SYMBOL(saa7134_set_gpio);
-EXPORT_SYMBOL(saa7134_devlist);
 EXPORT_SYMBOL(saa7134_boards);
 
 /* ----------------- for the DMA sound modules --------------- */
diff --git a/linux/drivers/media/video/saa7134/saa7134-video.c b/linux/drivers/media/video/saa7134/saa7134-video.c
index f3c170d23..be7f98bc0 100644
--- a/linux/drivers/media/video/saa7134/saa7134-video.c
+++ b/linux/drivers/media/video/saa7134/saa7134-video.c
@@ -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;
 }
 
diff --git a/linux/drivers/media/video/saa7134/saa7134.h b/linux/drivers/media/video/saa7134/saa7134.h
index f681751ae..c9d4d4354 100644
--- a/linux/drivers/media/video/saa7134/saa7134.h
+++ b/linux/drivers/media/video/saa7134/saa7134.h
@@ -646,6 +646,7 @@ 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);