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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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e135eeef0b
The size parameter of strscpy() is optional if the destination buffer has a fixed length and strscpy() can automatically determine its size using sizeof(). This makes many explicit size arguments redundant. Remove them to shorten and simplify the code. No functional changes intended. Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev> Signed-off-by: Takashi Iwai <tiwai@suse.de>
99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Apple Onboard Audio Alsa helpers
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*
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* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
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*/
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#include <linux/module.h>
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#include "alsa.h"
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static int index = -1;
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module_param(index, int, 0444);
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MODULE_PARM_DESC(index, "index for AOA sound card.");
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static struct aoa_card *aoa_card;
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int aoa_alsa_init(char *name, struct module *mod, struct device *dev)
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{
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struct snd_card *alsa_card;
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int err;
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if (aoa_card)
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/* cannot be EEXIST due to usage in aoa_fabric_register */
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return -EBUSY;
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err = snd_card_new(dev, index, name, mod, sizeof(struct aoa_card),
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&alsa_card);
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if (err < 0)
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return err;
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aoa_card = alsa_card->private_data;
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aoa_card->alsa_card = alsa_card;
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strscpy(alsa_card->driver, "AppleOnbdAudio");
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strscpy(alsa_card->shortname, name);
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strscpy(alsa_card->longname, name);
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strscpy(alsa_card->mixername, name);
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err = snd_card_register(aoa_card->alsa_card);
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if (err < 0) {
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printk(KERN_ERR "snd-aoa: couldn't register alsa card\n");
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snd_card_free(aoa_card->alsa_card);
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aoa_card = NULL;
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return err;
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}
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return 0;
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}
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struct snd_card *aoa_get_card(void)
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{
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if (aoa_card)
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return aoa_card->alsa_card;
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return NULL;
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}
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EXPORT_SYMBOL_GPL(aoa_get_card);
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void aoa_alsa_cleanup(void)
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{
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if (aoa_card) {
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snd_card_free(aoa_card->alsa_card);
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aoa_card = NULL;
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}
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}
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int aoa_snd_device_new(enum snd_device_type type,
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void *device_data, const struct snd_device_ops *ops)
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{
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struct snd_card *card = aoa_get_card();
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int err;
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if (!card) return -ENOMEM;
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err = snd_device_new(card, type, device_data, ops);
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if (err) {
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printk(KERN_ERR "snd-aoa: failed to create snd device (%d)\n", err);
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return err;
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}
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err = snd_device_register(card, device_data);
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if (err) {
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printk(KERN_ERR "snd-aoa: failed to register "
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"snd device (%d)\n", err);
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printk(KERN_ERR "snd-aoa: have you forgotten the "
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"dev_register callback?\n");
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snd_device_free(card, device_data);
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}
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return err;
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}
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EXPORT_SYMBOL_GPL(aoa_snd_device_new);
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int aoa_snd_ctl_add(struct snd_kcontrol* control)
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{
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int err;
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if (!aoa_card) return -ENODEV;
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err = snd_ctl_add(aoa_card->alsa_card, control);
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if (err)
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printk(KERN_ERR "snd-aoa: failed to add alsa control (%d)\n",
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err);
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return err;
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}
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EXPORT_SYMBOL_GPL(aoa_snd_ctl_add);
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