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ALSA: ad1889: Allocate resources with device-managed APIs
This patch converts the resource management in PCI ad1889 driver with devres as a clean up. Each manual resource management is converted with the corresponding devres helper, and the card object release is managed now via card->private_free instead of a lowlevel snd_device. Also, the unnecessary ac97 free callbacks are removed, too. This should give no user-visible functional changes. Link: https://lore.kernel.org/r/20210715075941.23332-9-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
parent
3fcaf24e5d
commit
567f587541
@ -740,20 +740,6 @@ snd_ad1889_ac97_xinit(struct snd_ad1889 *chip)
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}
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static void
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snd_ad1889_ac97_bus_free(struct snd_ac97_bus *bus)
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{
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struct snd_ad1889 *chip = bus->private_data;
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chip->ac97_bus = NULL;
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}
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static void
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snd_ad1889_ac97_free(struct snd_ac97 *ac97)
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{
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struct snd_ad1889 *chip = ac97->private_data;
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chip->ac97 = NULL;
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}
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static int
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snd_ad1889_ac97_init(struct snd_ad1889 *chip, const char *quirk_override)
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{
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@ -771,11 +757,8 @@ snd_ad1889_ac97_init(struct snd_ad1889 *chip, const char *quirk_override)
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if (err < 0)
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return err;
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chip->ac97_bus->private_free = snd_ad1889_ac97_bus_free;
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memset(&ac97, 0, sizeof(ac97));
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ac97.private_data = chip;
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ac97.private_free = snd_ad1889_ac97_free;
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ac97.pci = chip->pci;
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err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97);
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@ -787,11 +770,10 @@ snd_ad1889_ac97_init(struct snd_ad1889 *chip, const char *quirk_override)
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return 0;
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}
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static int
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snd_ad1889_free(struct snd_ad1889 *chip)
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static void
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snd_ad1889_free(struct snd_card *card)
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{
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if (chip->irq < 0)
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goto skip_hw;
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struct snd_ad1889 *chip = card->private_data;
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spin_lock_irq(&chip->lock);
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@ -805,28 +787,51 @@ snd_ad1889_free(struct snd_ad1889 *chip)
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ad1889_readl(chip, AD_DMA_DISR); /* flush, dammit! */
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spin_unlock_irq(&chip->lock);
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if (chip->irq >= 0)
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free_irq(chip->irq, chip);
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skip_hw:
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iounmap(chip->iobase);
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pci_release_regions(chip->pci);
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pci_disable_device(chip->pci);
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kfree(chip);
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return 0;
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}
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static int
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snd_ad1889_dev_free(struct snd_device *device)
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snd_ad1889_create(struct snd_card *card, struct pci_dev *pci)
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{
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struct snd_ad1889 *chip = device->device_data;
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return snd_ad1889_free(chip);
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}
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struct snd_ad1889 *chip = card->private_data;
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int err;
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static int
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snd_ad1889_init(struct snd_ad1889 *chip)
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{
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err = pcim_enable_device(pci);
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if (err < 0)
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return err;
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/* check PCI availability (32bit DMA) */
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if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(32))) {
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dev_err(card->dev, "error setting 32-bit DMA mask.\n");
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return -ENXIO;
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}
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chip->card = card;
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chip->pci = pci;
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chip->irq = -1;
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/* (1) PCI resource allocation */
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err = pcim_iomap_regions(pci, 1 << 0, card->driver);
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if (err < 0)
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return err;
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chip->bar = pci_resource_start(pci, 0);
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chip->iobase = pcim_iomap_table(pci)[0];
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pci_set_master(pci);
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spin_lock_init(&chip->lock); /* only now can we call ad1889_free */
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if (devm_request_irq(&pci->dev, pci->irq, snd_ad1889_interrupt,
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IRQF_SHARED, KBUILD_MODNAME, chip)) {
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dev_err(card->dev, "cannot obtain IRQ %d\n", pci->irq);
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return -EBUSY;
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}
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chip->irq = pci->irq;
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card->sync_irq = chip->irq;
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card->private_free = snd_ad1889_free;
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/* (2) initialization of the chip hardware */
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ad1889_writew(chip, AD_DS_CCS, AD_DS_CCS_CLKEN); /* turn on clock */
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ad1889_readw(chip, AD_DS_CCS); /* flush posted write */
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@ -838,94 +843,6 @@ snd_ad1889_init(struct snd_ad1889 *chip)
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return 0;
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}
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static int
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snd_ad1889_create(struct snd_card *card,
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struct pci_dev *pci,
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struct snd_ad1889 **rchip)
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{
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int err;
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struct snd_ad1889 *chip;
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static const struct snd_device_ops ops = {
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.dev_free = snd_ad1889_dev_free,
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};
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*rchip = NULL;
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err = pci_enable_device(pci);
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if (err < 0)
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return err;
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/* check PCI availability (32bit DMA) */
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if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(32))) {
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dev_err(card->dev, "error setting 32-bit DMA mask.\n");
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pci_disable_device(pci);
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return -ENXIO;
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}
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/* allocate chip specific data with zero-filled memory */
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chip = kzalloc(sizeof(*chip), GFP_KERNEL);
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if (!chip) {
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pci_disable_device(pci);
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return -ENOMEM;
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}
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chip->card = card;
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card->private_data = chip;
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chip->pci = pci;
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chip->irq = -1;
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/* (1) PCI resource allocation */
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err = pci_request_regions(pci, card->driver);
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if (err < 0)
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goto free_and_ret;
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chip->bar = pci_resource_start(pci, 0);
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chip->iobase = pci_ioremap_bar(pci, 0);
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if (chip->iobase == NULL) {
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dev_err(card->dev, "unable to reserve region.\n");
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err = -EBUSY;
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goto free_and_ret;
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}
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pci_set_master(pci);
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spin_lock_init(&chip->lock); /* only now can we call ad1889_free */
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if (request_irq(pci->irq, snd_ad1889_interrupt,
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IRQF_SHARED, KBUILD_MODNAME, chip)) {
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dev_err(card->dev, "cannot obtain IRQ %d\n", pci->irq);
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snd_ad1889_free(chip);
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return -EBUSY;
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}
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chip->irq = pci->irq;
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card->sync_irq = chip->irq;
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/* (2) initialization of the chip hardware */
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err = snd_ad1889_init(chip);
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if (err < 0) {
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snd_ad1889_free(chip);
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return err;
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}
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err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
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if (err < 0) {
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snd_ad1889_free(chip);
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return err;
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}
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*rchip = chip;
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return 0;
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free_and_ret:
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kfree(chip);
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pci_disable_device(pci);
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return err;
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}
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static int
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snd_ad1889_probe(struct pci_dev *pci,
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const struct pci_device_id *pci_id)
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@ -944,19 +861,19 @@ snd_ad1889_probe(struct pci_dev *pci,
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}
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/* (2) */
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err = snd_card_new(&pci->dev, index[devno], id[devno], THIS_MODULE,
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0, &card);
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/* XXX REVISIT: we can probably allocate chip in this call */
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err = snd_devm_card_new(&pci->dev, index[devno], id[devno], THIS_MODULE,
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sizeof(*chip), &card);
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if (err < 0)
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return err;
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chip = card->private_data;
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strcpy(card->driver, "AD1889");
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strcpy(card->shortname, "Analog Devices AD1889");
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/* (3) */
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err = snd_ad1889_create(card, pci, &chip);
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err = snd_ad1889_create(card, pci);
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if (err < 0)
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goto free_and_ret;
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return err;
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/* (4) */
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sprintf(card->longname, "%s at 0x%lx irq %i",
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@ -966,11 +883,11 @@ snd_ad1889_probe(struct pci_dev *pci,
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/* register AC97 mixer */
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err = snd_ad1889_ac97_init(chip, ac97_quirk[devno]);
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if (err < 0)
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goto free_and_ret;
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return err;
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err = snd_ad1889_pcm_init(chip, 0);
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if (err < 0)
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goto free_and_ret;
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return err;
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/* register proc interface */
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snd_ad1889_proc_init(chip);
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@ -978,23 +895,13 @@ snd_ad1889_probe(struct pci_dev *pci,
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/* (6) */
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err = snd_card_register(card);
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if (err < 0)
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goto free_and_ret;
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return err;
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/* (7) */
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pci_set_drvdata(pci, card);
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devno++;
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return 0;
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free_and_ret:
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snd_card_free(card);
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return err;
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}
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static void
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snd_ad1889_remove(struct pci_dev *pci)
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{
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snd_card_free(pci_get_drvdata(pci));
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}
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static const struct pci_device_id snd_ad1889_ids[] = {
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@ -1007,7 +914,6 @@ static struct pci_driver ad1889_pci_driver = {
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.name = KBUILD_MODNAME,
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.id_table = snd_ad1889_ids,
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.probe = snd_ad1889_probe,
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.remove = snd_ad1889_remove,
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};
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module_pci_driver(ad1889_pci_driver);
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