From: Takashi Iwai <tiwai@suse.de>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Eric Anholt <eric@anholt.net>,
Stefan Wahren <stefan.wahren@i2se.com>,
linux-rpi-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 29/29] staging: bcm2835-audio: Simplify card object management
Date: Tue, 4 Sep 2018 17:58:58 +0200 [thread overview]
Message-ID: <20180904155858.8001-30-tiwai@suse.de> (raw)
In-Reply-To: <20180904155858.8001-1-tiwai@suse.de>
Instead of creating a dummy child device to manage the card object,
just use devm stuff directly for releasing with snd_card_free().
This results in a lot of code reduction.
Since the dummy child devices are gone, the device object to be passed
to the memory allocator needs to be adjusted as well.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
.../vc04_services/bcm2835-audio/bcm2835-pcm.c | 2 +-
.../vc04_services/bcm2835-audio/bcm2835.c | 120 +++++-------------
2 files changed, 33 insertions(+), 89 deletions(-)
diff --git a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c
index 98480d97cc2e..e66da11af5cf 100644
--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c
+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c
@@ -349,7 +349,7 @@ int snd_bcm2835_new_pcm(struct bcm2835_chip *chip, const char *name,
&snd_bcm2835_playback_ops);
snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
- chip->card->dev->parent, 128 * 1024, 128 * 1024);
+ chip->card->dev, 128 * 1024, 128 * 1024);
if (spdif)
chip->pcm_spdif = pcm;
diff --git a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
index 2869f310086f..87d56ab1ffa0 100644
--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
@@ -22,38 +22,6 @@ module_param(enable_compat_alsa, bool, 0444);
MODULE_PARM_DESC(enable_compat_alsa,
"Enables ALSA compatibility virtual audio device");
-static void snd_devm_unregister_child(struct device *dev, void *res)
-{
- struct device *childdev = *(struct device **)res;
- struct bcm2835_chip *chip = dev_get_drvdata(childdev);
- struct snd_card *card = chip->card;
-
- snd_card_free(card);
-
- device_unregister(childdev);
-}
-
-static int snd_devm_add_child(struct device *dev, struct device *child)
-{
- struct device **dr;
- int ret;
-
- dr = devres_alloc(snd_devm_unregister_child, sizeof(*dr), GFP_KERNEL);
- if (!dr)
- return -ENOMEM;
-
- ret = device_add(child);
- if (ret) {
- devres_free(dr);
- return ret;
- }
-
- *dr = child;
- devres_add(dev, dr);
-
- return 0;
-}
-
static void bcm2835_devm_free_vchi_ctx(struct device *dev, void *res)
{
struct bcm2835_vchi_ctx *vchi_ctx = res;
@@ -84,36 +52,6 @@ static int bcm2835_devm_add_vchi_ctx(struct device *dev)
return 0;
}
-static void snd_bcm2835_release(struct device *dev)
-{
-}
-
-static struct device *
-snd_create_device(struct device *parent,
- struct device_driver *driver,
- const char *name)
-{
- struct device *device;
- int ret;
-
- device = devm_kzalloc(parent, sizeof(*device), GFP_KERNEL);
- if (!device)
- return ERR_PTR(-ENOMEM);
-
- device_initialize(device);
- device->parent = parent;
- device->driver = driver;
- device->release = snd_bcm2835_release;
-
- dev_set_name(device, "%s", name);
-
- ret = snd_devm_add_child(parent, device);
- if (ret)
- return ERR_PTR(ret);
-
- return device;
-}
-
typedef int (*bcm2835_audio_newpcm_func)(struct bcm2835_chip *chip,
const char *name,
enum snd_bcm2835_route route,
@@ -216,40 +154,36 @@ static struct bcm2835_audio_drivers children_devices[] = {
},
};
-static int snd_add_child_device(struct device *device,
+static void bcm2835_card_free(void *data)
+{
+ snd_card_free(data);
+}
+
+static int snd_add_child_device(struct device *dev,
struct bcm2835_audio_driver *audio_driver,
u32 numchans)
{
struct snd_card *card;
- struct device *child;
struct bcm2835_chip *chip;
int err;
- child = snd_create_device(device, &audio_driver->driver,
- audio_driver->driver.name);
- if (IS_ERR(child)) {
- dev_err(device,
- "Unable to create child device %p, error %ld",
- audio_driver->driver.name,
- PTR_ERR(child));
- return PTR_ERR(child);
- }
-
- err = snd_card_new(child, -1, NULL, THIS_MODULE, sizeof(*chip), &card);
+ err = snd_card_new(dev, -1, NULL, THIS_MODULE, sizeof(*chip), &card);
if (err < 0) {
- dev_err(child, "Failed to create card");
+ dev_err(dev, "Failed to create card");
return err;
}
chip = card->private_data;
chip->card = card;
- chip->dev = child;
+ chip->dev = dev;
mutex_init(&chip->audio_mutex);
- chip->vchi_ctx = devres_find(device,
+ chip->vchi_ctx = devres_find(dev,
bcm2835_devm_free_vchi_ctx, NULL, NULL);
- if (!chip->vchi_ctx)
- return -ENODEV;
+ if (!chip->vchi_ctx) {
+ err = -ENODEV;
+ goto error;
+ }
strcpy(card->driver, audio_driver->driver.name);
strcpy(card->shortname, audio_driver->shortname);
@@ -259,26 +193,36 @@ static int snd_add_child_device(struct device *device,
audio_driver->route,
numchans);
if (err) {
- dev_err(child, "Failed to create pcm, error %d\n", err);
- return err;
+ dev_err(dev, "Failed to create pcm, error %d\n", err);
+ goto error;
}
err = audio_driver->newctl(chip);
if (err) {
- dev_err(child, "Failed to create controls, error %d\n", err);
- return err;
+ dev_err(dev, "Failed to create controls, error %d\n", err);
+ goto error;
}
err = snd_card_register(card);
if (err) {
- dev_err(child, "Failed to register card, error %d\n", err);
- return err;
+ dev_err(dev, "Failed to register card, error %d\n", err);
+ goto error;
}
- dev_set_drvdata(child, chip);
- dev_info(child, "card created with %d channels\n", numchans);
+ dev_set_drvdata(dev, chip);
+ err = devm_add_action(dev, bcm2835_card_free, card);
+ if (err < 0) {
+ dev_err(dev, "Failed to add devm action, err %d\n", err);
+ goto error;
+ }
+
+ dev_info(dev, "card created with %d channels\n", numchans);
return 0;
+
+ error:
+ snd_card_free(card);
+ return err;
}
static int snd_add_child_devices(struct device *device, u32 numchans)
--
2.18.0
next prev parent reply other threads:[~2018-09-04 15:59 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-04 15:58 [PATCH 00/29] staging: bcm2835-audio: Cleanups and fixes Takashi Iwai
2018-09-04 15:58 ` [PATCH 01/29] staging: bcm2835-audio: Clean up mutex locks Takashi Iwai
2018-09-04 15:58 ` [PATCH 02/29] staging: bcm2835-audio: Remove redundant spdif stream ctls Takashi Iwai
2018-09-04 15:58 ` [PATCH 03/29] staging: bcm2835-audio: Clean up include files in bcm2835-ctl.c Takashi Iwai
2018-09-08 13:25 ` Stefan Wahren
2018-09-08 16:21 ` Takashi Iwai
2018-09-04 15:58 ` [PATCH 04/29] staging: bcm2835-audio: Remove redundant substream mask checks Takashi Iwai
2018-09-04 15:58 ` [PATCH 05/29] staging: bcm2835-audio: Fix mute controls, volume handling cleanup Takashi Iwai
2018-09-04 15:58 ` [PATCH 06/29] staging: bcm2835-audio: Remove redundant function calls Takashi Iwai
2018-09-04 15:58 ` [PATCH 07/29] staging: bcm2835-audio: Remove superfluous open flag Takashi Iwai
2018-09-04 15:58 ` [PATCH 08/29] staging: bcm2835-audio: Drop useless running flag and check Takashi Iwai
2018-09-04 15:58 ` [PATCH 09/29] staging: bcm2835-audio: Fix incorrect draining handling Takashi Iwai
2018-09-04 15:58 ` [PATCH 10/29] staging: bcm2835-audio: Kill unused spinlock Takashi Iwai
2018-09-04 15:58 ` [PATCH 11/29] staging: bcm2835-audio: Use PCM runtime values instead Takashi Iwai
2018-09-04 15:58 ` [PATCH 12/29] staging: bcm2835-audio: Drop unnecessary pcm indirect setup Takashi Iwai
2018-09-04 15:58 ` [PATCH 13/29] staging: bcm2835-audio: Drop useless NULL check Takashi Iwai
2018-09-04 15:58 ` [PATCH 14/29] staging: bcm2835-audio: Propagate parameter setup error Takashi Iwai
2018-09-04 15:58 ` [PATCH 15/29] staging: bcm2835-audio: Drop debug messages in bcm2835-pcm.c Takashi Iwai
2018-09-04 15:58 ` [PATCH 16/29] staging: bcm2835-audio: Drop superfluous mutex lock during prepare Takashi Iwai
2018-09-08 13:40 ` Stefan Wahren
2018-09-08 16:12 ` Takashi Iwai
2018-09-04 15:58 ` [PATCH 17/29] staging: bcm2835-audio: Add 10ms period constraint Takashi Iwai
2018-09-19 9:42 ` Stefan Wahren
2018-09-19 9:52 ` Takashi Iwai
2018-09-19 12:41 ` Stefan Wahren
2018-09-19 12:47 ` Mike Brady
2018-09-19 18:39 ` Takashi Iwai
2018-10-09 13:18 ` [PATCH 17/29] staging: bcm2835-audio: Add 10ms period constraint [Resend in plain text...] Mike Brady
2018-10-09 13:44 ` Takashi Iwai
2018-10-09 15:28 ` Mike Brady
2018-10-09 15:32 ` Takashi Iwai
2018-10-11 12:53 ` Mike Brady
2018-10-11 14:07 ` Stefan Wahren
2018-10-13 15:00 ` Mike Brady
2018-10-13 15:45 ` Takashi Iwai
2018-09-04 15:58 ` [PATCH 18/29] staging: bcm2835-audio: Make single vchi handle Takashi Iwai
2018-09-04 15:58 ` [PATCH 19/29] staging: bcm2835-audio: Code refactoring of vchiq accessor codes Takashi Iwai
2018-09-04 15:58 ` [PATCH 20/29] staging: bcm2835-audio: Operate non-atomic PCM ops Takashi Iwai
2018-09-04 15:58 ` [PATCH 21/29] staging: bcm2835-audio: Use card->private_data Takashi Iwai
2018-09-04 15:58 ` [PATCH 22/29] staging: bcm2835-audio: Use standard error print helpers Takashi Iwai
2018-09-04 15:58 ` [PATCH 23/29] staging: bcm2835-audio: Remove unnecessary header file includes Takashi Iwai
2018-09-04 15:58 ` [PATCH 24/29] staging: bcm2835-audio: Move module parameter description Takashi Iwai
2018-09-04 15:58 ` [PATCH 25/29] staging: bcm2835-audio: Use coherent device buffers Takashi Iwai
2018-09-04 15:58 ` [PATCH 26/29] staging: bcm2835-audio: Set SNDRV_PCM_INFO_SYNC_APPLPTR Takashi Iwai
2018-09-04 15:58 ` [PATCH 27/29] staging: bcm2835-audio: Simplify PCM creation helpers Takashi Iwai
2018-09-04 15:58 ` [PATCH 28/29] staging: bcm2835-audio: Simplify kctl " Takashi Iwai
2018-09-04 15:58 ` Takashi Iwai [this message]
2018-09-08 13:18 ` [PATCH 00/29] staging: bcm2835-audio: Cleanups and fixes Stefan Wahren
2018-09-08 16:21 ` Takashi Iwai
2018-09-08 17:00 ` Stefan Wahren
2018-09-08 17:16 ` Takashi Iwai
2018-09-10 9:12 ` Greg Kroah-Hartman
2018-09-10 9:16 ` Takashi Iwai
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