ALSA: opl3sa2: drop snd_card pointer from the snd_opl3sa2 structure

Remove card pointer from the snd_opl3sa2
structure and break circular reference
snd_card->snd_opl3sa2->snd_card.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Acked-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 19 insertions, 14 deletions

diff --git a/sound/isa/opl3sa2.c b/sound/isa/opl3sa2.c
index 949fee5cd070..1ac29270a402 100644
--- a/sound/isa/opl3sa2.c
+++ b/sound/isa/opl3sa2.c
@@ -124,7 +124,6 @@ static int pnpc_registered;
 #define OPL3SA2_PM_D3   (OPL3SA2_PM_ADOWN|OPL3SA2_PM_PSV|OPL3SA2_PM_PDN|OPL3SA2_PM_PDX)
 
 struct snd_opl3sa2 {
-        struct snd_card *card;
         int version;            /* 2 or 3 */
         unsigned long port;     /* control port */
         struct resource *res_port; /* control port resource */
@@ -222,14 +221,13 @@ static void snd_opl3sa2_write(struct snd_opl3sa2 *chip, unsigned char reg, unsig
         spin_unlock_irqrestore(&chip->reg_lock, flags);
 }
 
-static int __devinit snd_opl3sa2_detect(struct snd_opl3sa2 *chip)
+static int __devinit snd_opl3sa2_detect(struct snd_card *card)
 {
-        struct snd_card *card;
+        struct snd_opl3sa2 *chip = card->private_data;
         unsigned long port;
         unsigned char tmp, tmp1;
         char str[2];
 
-        card = chip->card;
         port = chip->port;
         if ((chip->res_port = request_region(port, 2, "OPL3-SA control")) == NULL) {
                 snd_printk(KERN_ERR PFX "can't grab port 0x%lx\n", port);
@@ -298,12 +296,14 @@ static int __devinit snd_opl3sa2_detect(struct snd_opl3sa2 *chip)
 static irqreturn_t snd_opl3sa2_interrupt(int irq, void *dev_id)
 {
         unsigned short status;
-        struct snd_opl3sa2 *chip = dev_id;
+        struct snd_card *card = dev_id;
+        struct snd_opl3sa2 *chip;
         int handled = 0;
 
-        if (chip == NULL || chip->card == NULL)
+        if (card == NULL || card->private_data == NULL)
                 return IRQ_NONE;
 
+        chip = card->private_data;
         status = snd_opl3sa2_read(chip, OPL3SA2_IRQ_STATUS);
 
         if (status & 0x20) {
@@ -327,8 +327,10 @@ static irqreturn_t snd_opl3sa2_interrupt(int irq, void *dev_id)
                 snd_opl3sa2_read(chip, OPL3SA2_MASTER_RIGHT);
                 snd_opl3sa2_read(chip, OPL3SA2_MASTER_LEFT);
                 if (chip->master_switch && chip->master_volume) {
-                        snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE, &chip->master_switch->id);
-                        snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE, &chip->master_volume->id);
+                        snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE,
+                                        &chip->master_switch->id);
+                        snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE,
+                                        &chip->master_volume->id);
                 }
         }
         return IRQ_RETVAL(handled);
@@ -512,9 +514,9 @@ static void snd_opl3sa2_master_free(struct snd_kcontrol *kcontrol)
         chip->master_volume = NULL;
 }
 
-static int __devinit snd_opl3sa2_mixer(struct snd_opl3sa2 *chip)
+static int __devinit snd_opl3sa2_mixer(struct snd_card *card)
 {
-        struct snd_card *card = chip->card;
+        struct snd_opl3sa2 *chip = card->private_data;
         struct snd_ctl_elem_id id1, id2;
         struct snd_kcontrol *kctl;
         unsigned int idx;
@@ -650,7 +652,6 @@ static struct snd_card *snd_opl3sa2_card_new(int dev)
         chip = card->private_data;
         spin_lock_init(&chip->reg_lock);
         chip->irq = -1;
-        chip->card = card;
         card->private_free = snd_opl3sa2_free;
         return card;
 }
@@ -672,9 +673,12 @@ static int __devinit snd_opl3sa2_probe(struct snd_card *card, int dev)
         xdma2 = dma2[dev];
         if (xdma2 < 0)
                 chip->single_dma = 1;
-        if ((err = snd_opl3sa2_detect(chip)) < 0)
+        err = snd_opl3sa2_detect(card);
+        if (err < 0)
                 return err;
-        if (request_irq(xirq, snd_opl3sa2_interrupt, IRQF_DISABLED, "OPL3-SA2", chip)) {
+        err = request_irq(xirq, snd_opl3sa2_interrupt, IRQF_DISABLED,
+                          "OPL3-SA2", card);
+        if (err) {
                 snd_printk(KERN_ERR PFX "can't grab IRQ %d\n", xirq);
                 return -ENODEV;
         }
@@ -694,7 +698,8 @@ static int __devinit snd_opl3sa2_probe(struct snd_card *card, int dev)
         err = snd_wss_mixer(wss);
         if (err < 0)
                 return err;
-        if ((err = snd_opl3sa2_mixer(chip)) < 0)
+        err = snd_opl3sa2_mixer(card);
+        if (err < 0)
                 return err;
         err = snd_wss_timer(wss, 0, NULL);
         if (err < 0)