[media] cx25821: remove unnecessary global devlist

This device list is not necessary. The kernel already has all that information,
so just use that instead.
Also remove a bogus refcount and some dead 'private_free' code in the alsa driver.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 26 insertions, 53 deletions

diff --git a/drivers/media/pci/cx25821/cx25821-alsa.c b/drivers/media/pci/cx25821/cx25821-alsa.c
index b3cac75a4891..81361c26c54e 100644
--- a/drivers/media/pci/cx25821/cx25821-alsa.c
+++ b/drivers/media/pci/cx25821/cx25821-alsa.c
@@ -59,7 +59,6 @@ do {									\
 	Data type declarations - Can be moded to a header file later
  ****************************************************************************/
 
-static struct snd_card *snd_cx25821_cards[SNDRV_CARDS];
 static int devno;
 
 struct cx25821_audio_buffer {
@@ -627,34 +626,6 @@ static DEFINE_PCI_DEVICE_TABLE(cx25821_audio_pci_tbl) = {
 MODULE_DEVICE_TABLE(pci, cx25821_audio_pci_tbl);
 
 /*
- * Not used in the function snd_cx25821_dev_free so removing
- * from the file.
- */
-/*
-static int snd_cx25821_free(struct cx25821_audio_dev *chip)
-{
-	if (chip->irq >= 0)
-		free_irq(chip->irq, chip);
-
-	cx25821_dev_unregister(chip->dev);
-	pci_disable_device(chip->pci);
-
-	return 0;
-}
-*/
-
-/*
- * Component Destructor
- */
-static void snd_cx25821_dev_free(struct snd_card *card)
-{
-	struct cx25821_audio_dev *chip = card->private_data;
-
-	/* snd_cx25821_free(chip); */
-	snd_card_free(chip->card);
-}
-
-/*
  * Alsa Constructor - Component probe
  */
 static int cx25821_audio_initdev(struct cx25821_dev *dev)
@@ -685,7 +656,6 @@ static int cx25821_audio_initdev(struct cx25821_dev *dev)
 	strcpy(card->driver, "cx25821");
 
 	/* Card "creation" */
-	card->private_free = snd_cx25821_dev_free;
 	chip = card->private_data;
 	spin_lock_init(&chip->reg_lock);
 
@@ -729,8 +699,7 @@ static int cx25821_audio_initdev(struct cx25821_dev *dev)
 		goto error;
 	}
 
-	snd_cx25821_cards[devno] = card;
-
+	dev->card = card;
 	devno++;
 	return 0;
 
@@ -742,9 +711,31 @@ error:
 /****************************************************************************
 				LINUX MODULE INIT
  ****************************************************************************/
+
+static int cx25821_alsa_exit_callback(struct device *dev, void *data)
+{
+	struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
+	struct cx25821_dev *cxdev = get_cx25821(v4l2_dev);
+
+	snd_card_free(cxdev->card);
+	return 0;
+}
+
 static void cx25821_audio_fini(void)
 {
-	snd_card_free(snd_cx25821_cards[0]);
+	struct device_driver *drv = driver_find("cx25821", &pci_bus_type);
+	int ret;
+
+	ret = driver_for_each_device(drv, NULL, NULL, cx25821_alsa_exit_callback);
+}
+
+static int cx25821_alsa_init_callback(struct device *dev, void *data)
+{
+	struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
+	struct cx25821_dev *cxdev = get_cx25821(v4l2_dev);
+
+	cx25821_audio_initdev(cxdev);
+	return 0;
 }
 
 /*
@@ -756,29 +747,11 @@ static void cx25821_audio_fini(void)
  */
 static int cx25821_alsa_init(void)
 {
-	struct cx25821_dev *dev = NULL;
-	struct list_head *list;
+	struct device_driver *drv = driver_find("cx25821", &pci_bus_type);
 
-	mutex_lock(&cx25821_devlist_mutex);
-	list_for_each(list, &cx25821_devlist) {
-		dev = list_entry(list, struct cx25821_dev, devlist);
-		cx25821_audio_initdev(dev);
-	}
-	mutex_unlock(&cx25821_devlist_mutex);
-
-	if (dev == NULL)
-		pr_info("ERROR ALSA: no cx25821 cards found\n");
-
-	return 0;
+	return driver_for_each_device(drv, NULL, NULL, cx25821_alsa_init_callback);
 
 }
 
 late_initcall(cx25821_alsa_init);
 module_exit(cx25821_audio_fini);
-
-/* ----------------------------------------------------------- */
-/*
- * Local variables:
- * c-basic-offset: 8
- * End:
- */