ALSA: als300: Allocate resources with device-managed APIs

This patch converts the resource management in PCI als300 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.

This should give no user-visible functional changes.

Link: https://lore.kernel.org/r/20210715075941.23332-10-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/als300.c b/sound/pci/als300.c
index 668008f..9c94072 100644 (file)
--- a/sound/pci/als300.c
+++ b/sound/pci/als300.c
@@ -163,21 +163,11 @@ static void snd_als300_set_irq_flag(struct snd_als300 *chip, int cmd)
        snd_als300_gcr_write(chip->port, MISC_CONTROL, tmp);
 }
 
-static int snd_als300_free(struct snd_als300 *chip)
+static void snd_als300_free(struct snd_card *card)
 {
-       snd_als300_set_irq_flag(chip, IRQ_DISABLE);
-       if (chip->irq >= 0)
-               free_irq(chip->irq, chip);
-       pci_release_regions(chip->pci);
-       pci_disable_device(chip->pci);
-       kfree(chip);
-       return 0;
-}
+       struct snd_als300 *chip = card->private_data;
 
-static int snd_als300_dev_free(struct snd_device *device)
-{
-       struct snd_als300 *chip = device->device_data;
-       return snd_als300_free(chip);
+       snd_als300_set_irq_flag(chip, IRQ_DISABLE);
 }
 
 static irqreturn_t snd_als300_interrupt(int irq, void *dev_id)
@@ -248,11 +238,6 @@ static irqreturn_t snd_als300plus_interrupt(int irq, void *dev_id)
        return IRQ_HANDLED;
 }
 
-static void snd_als300_remove(struct pci_dev *pci)
-{
-       snd_card_free(pci_get_drvdata(pci));
-}
-
 static unsigned short snd_als300_ac97_read(struct snd_ac97 *ac97,
                                                        unsigned short reg)
 {
@@ -610,35 +595,22 @@ static void snd_als300_init(struct snd_als300 *chip)
 }
 
 static int snd_als300_create(struct snd_card *card,
-                            struct pci_dev *pci, int chip_type,
-                            struct snd_als300 **rchip)
+                            struct pci_dev *pci, int chip_type)
 {
-       struct snd_als300 *chip;
+       struct snd_als300 *chip = card->private_data;
        void *irq_handler;
        int err;
 
-       static const struct snd_device_ops ops = {
-               .dev_free = snd_als300_dev_free,
-       };
-       *rchip = NULL;
-
-       err = pci_enable_device(pci);
+       err = pcim_enable_device(pci);
        if (err < 0)
                return err;
 
        if (dma_set_mask_and_coherent(&pci->dev, DMA_BIT_MASK(28))) {
                dev_err(card->dev, "error setting 28bit DMA mask\n");
-               pci_disable_device(pci);
                return -ENXIO;
        }
        pci_set_master(pci);
 
-       chip = kzalloc(sizeof(*chip), GFP_KERNEL);
-       if (chip == NULL) {
-               pci_disable_device(pci);
-               return -ENOMEM;
-       }
-
        chip->card = card;
        chip->pci = pci;
        chip->irq = -1;
@@ -646,11 +618,9 @@ static int snd_als300_create(struct snd_card *card,
        spin_lock_init(&chip->reg_lock);
 
        err = pci_request_regions(pci, "ALS300");
-       if (err < 0) {
-               kfree(chip);
-               pci_disable_device(pci);
+       if (err < 0)
                return err;
-       }
+
        chip->port = pci_resource_start(pci, 0);
 
        if (chip->chip_type == DEVICE_ALS300_PLUS)
@@ -658,38 +628,29 @@ static int snd_als300_create(struct snd_card *card,
        else
                irq_handler = snd_als300_interrupt;
 
-       if (request_irq(pci->irq, irq_handler, IRQF_SHARED,
-                       KBUILD_MODNAME, chip)) {
+       if (devm_request_irq(&pci->dev, pci->irq, irq_handler, IRQF_SHARED,
+                            KBUILD_MODNAME, chip)) {
                dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
-               snd_als300_free(chip);
                return -EBUSY;
        }
        chip->irq = pci->irq;
        card->sync_irq = chip->irq;
+       card->private_free = snd_als300_free;
 
        snd_als300_init(chip);
 
        err = snd_als300_ac97(chip);
        if (err < 0) {
                dev_err(card->dev, "Could not create ac97\n");
-               snd_als300_free(chip);
                return err;
        }
 
        err = snd_als300_new_pcm(chip);
        if (err < 0) {
                dev_err(card->dev, "Could not create PCM\n");
-               snd_als300_free(chip);
-               return err;
-       }
-
-       err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
-       if (err < 0) {
-               snd_als300_free(chip);
                return err;
        }
 
-       *rchip = chip;
        return 0;
 }
 
@@ -737,20 +698,16 @@ static int snd_als300_probe(struct pci_dev *pci,
                return -ENOENT;
        }
 
-       err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
-                          0, &card);
-
+       err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
+                               sizeof(*chip), &card);
        if (err < 0)
                return err;
 
        chip_type = pci_id->driver_data;
 
-       err = snd_als300_create(card, pci, chip_type, &chip);
-       if (err < 0) {
-               snd_card_free(card);
+       err = snd_als300_create(card, pci, chip_type);
+       if (err < 0)
                return err;
-       }
-       card->private_data = chip;
 
        strcpy(card->driver, "ALS300");
        if (chip->chip_type == DEVICE_ALS300_PLUS)
@@ -764,10 +721,9 @@ static int snd_als300_probe(struct pci_dev *pci,
                                card->shortname, chip->port, chip->irq);
 
        err = snd_card_register(card);
-       if (err < 0) {
-               snd_card_free(card);
+       if (err < 0)
                return err;
-       }
+
        pci_set_drvdata(pci, card);
        dev++;
        return 0;
@@ -777,7 +733,6 @@ static struct pci_driver als300_driver = {
        .name = KBUILD_MODNAME,
        .id_table = snd_als300_ids,
        .probe = snd_als300_probe,
-       .remove = snd_als300_remove,
        .driver = {
                .pm = SND_ALS300_PM_OPS,
        },