From 897c8882df5875fe0bbc3e93ee8e9ba4a2c6ca0d Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Wed, 16 Aug 2023 18:02:47 +0200 Subject: [PATCH] ALSA: hwdep: Don't embed device Like control and PCM devices, it's better to avoid the embedded struct device for hwdep (although it's more or less well working), too. Change it to allocate via snd_device_alloc(), and free the memory at the common snd_hwdep_free(). Reviewed-by: Jaroslav Kysela Signed-off-by: Curtis Malainey Tested-by: Curtis Malainey Link: https://lore.kernel.org/r/20230816160252.23396-5-tiwai@suse.de Signed-off-by: Takashi Iwai --- include/sound/hwdep.h | 2 +- sound/core/hwdep.c | 38 +++++++++++++++++++++----------------- sound/pci/hda/hda_hwdep.c | 4 ++-- 3 files changed, 24 insertions(+), 20 deletions(-) diff --git a/include/sound/hwdep.h b/include/sound/hwdep.h index 8d6cdb254039..b0da633184cd 100644 --- a/include/sound/hwdep.h +++ b/include/sound/hwdep.h @@ -53,7 +53,7 @@ struct snd_hwdep { wait_queue_head_t open_wait; void *private_data; void (*private_free) (struct snd_hwdep *hwdep); - struct device dev; + struct device *dev; struct mutex open_mutex; int used; /* reference counter */ diff --git a/sound/core/hwdep.c b/sound/core/hwdep.c index e95fa275c289..de7476034f2c 100644 --- a/sound/core/hwdep.c +++ b/sound/core/hwdep.c @@ -338,9 +338,14 @@ static const struct file_operations snd_hwdep_f_ops = .mmap = snd_hwdep_mmap, }; -static void release_hwdep_device(struct device *dev) +static void snd_hwdep_free(struct snd_hwdep *hwdep) { - kfree(container_of(dev, struct snd_hwdep, dev)); + if (!hwdep) + return; + if (hwdep->private_free) + hwdep->private_free(hwdep); + put_device(hwdep->dev); + kfree(hwdep); } /** @@ -382,16 +387,20 @@ int snd_hwdep_new(struct snd_card *card, char *id, int device, if (id) strscpy(hwdep->id, id, sizeof(hwdep->id)); - snd_device_initialize(&hwdep->dev, card); - hwdep->dev.release = release_hwdep_device; - dev_set_name(&hwdep->dev, "hwC%iD%i", card->number, device); + err = snd_device_alloc(&hwdep->dev, card); + if (err < 0) { + snd_hwdep_free(hwdep); + return err; + } + + dev_set_name(hwdep->dev, "hwC%iD%i", card->number, device); #ifdef CONFIG_SND_OSSEMUL hwdep->oss_type = -1; #endif err = snd_device_new(card, SNDRV_DEV_HWDEP, hwdep, &ops); if (err < 0) { - put_device(&hwdep->dev); + snd_hwdep_free(hwdep); return err; } @@ -403,12 +412,7 @@ EXPORT_SYMBOL(snd_hwdep_new); static int snd_hwdep_dev_free(struct snd_device *device) { - struct snd_hwdep *hwdep = device->device_data; - if (!hwdep) - return 0; - if (hwdep->private_free) - hwdep->private_free(hwdep); - put_device(&hwdep->dev); + snd_hwdep_free(device->device_data); return 0; } @@ -426,9 +430,9 @@ static int snd_hwdep_dev_register(struct snd_device *device) list_add_tail(&hwdep->list, &snd_hwdep_devices); err = snd_register_device(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card, hwdep->device, - &snd_hwdep_f_ops, hwdep, &hwdep->dev); + &snd_hwdep_f_ops, hwdep, hwdep->dev); if (err < 0) { - dev_err(&hwdep->dev, "unable to register\n"); + dev_err(hwdep->dev, "unable to register\n"); list_del(&hwdep->list); mutex_unlock(®ister_mutex); return err; @@ -439,12 +443,12 @@ static int snd_hwdep_dev_register(struct snd_device *device) if (hwdep->oss_type >= 0) { if (hwdep->oss_type == SNDRV_OSS_DEVICE_TYPE_DMFM && hwdep->device) - dev_warn(&hwdep->dev, + dev_warn(hwdep->dev, "only hwdep device 0 can be registered as OSS direct FM device!\n"); else if (snd_register_oss_device(hwdep->oss_type, card, hwdep->device, &snd_hwdep_f_ops, hwdep) < 0) - dev_warn(&hwdep->dev, + dev_warn(hwdep->dev, "unable to register OSS compatibility device\n"); else hwdep->ossreg = 1; @@ -471,7 +475,7 @@ static int snd_hwdep_dev_disconnect(struct snd_device *device) if (hwdep->ossreg) snd_unregister_oss_device(hwdep->oss_type, hwdep->card, hwdep->device); #endif - snd_unregister_device(&hwdep->dev); + snd_unregister_device(hwdep->dev); list_del_init(&hwdep->list); mutex_unlock(&hwdep->open_mutex); mutex_unlock(®ister_mutex); diff --git a/sound/pci/hda/hda_hwdep.c b/sound/pci/hda/hda_hwdep.c index 125e97fe0b1c..727f39acedfc 100644 --- a/sound/pci/hda/hda_hwdep.c +++ b/sound/pci/hda/hda_hwdep.c @@ -114,8 +114,8 @@ int snd_hda_create_hwdep(struct hda_codec *codec) #endif /* for sysfs */ - hwdep->dev.groups = snd_hda_dev_attr_groups; - dev_set_drvdata(&hwdep->dev, codec); + hwdep->dev->groups = snd_hda_dev_attr_groups; + dev_set_drvdata(hwdep->dev, codec); return 0; }