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authorJohannes Berg <johannes@sipsolutions.net>2006-10-05 15:08:23 +0200
committerJaroslav Kysela <perex@suse.cz>2007-02-09 09:00:09 +0100
commitd595ee7e0162ae66faa8c4c7d8c2069b40d64fed (patch)
tree91c1abaaee1b3498b031ea2142bd80456f20e702 /sound/aoa
parent73e85fe8452b950b93cfb61377f749e9b15437fb (diff)
downloadlinux-d595ee7e0162ae66faa8c4c7d8c2069b40d64fed.tar.gz
[ALSA] aoa: fix up i2sbus_attach_codec
This patch changes i2sbus_attach_codec to implement a proper error handling strategy using labels to jump to the right part. Since it has an elaborate set-up sequence it also needs that tear-down, which I had hard-coded inbetween all the checks. This increases readability and should reduce .text size as well. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/aoa')
-rw-r--r--sound/aoa/soundbus/i2sbus/i2sbus-pcm.c72
1 files changed, 26 insertions, 46 deletions
diff --git a/sound/aoa/soundbus/i2sbus/i2sbus-pcm.c b/sound/aoa/soundbus/i2sbus/i2sbus-pcm.c
index 051bb9b200e..7c81db7e52c 100644
--- a/sound/aoa/soundbus/i2sbus/i2sbus-pcm.c
+++ b/sound/aoa/soundbus/i2sbus/i2sbus-pcm.c
@@ -812,7 +812,6 @@ static void i2sbus_private_free(struct snd_pcm *pcm)
module_put(THIS_MODULE);
}
-/* FIXME: this function needs an error handling strategy with labels */
int
i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
struct codec_info *ci, void *data)
@@ -880,24 +879,21 @@ i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
if (!cii->sdev) {
printk(KERN_DEBUG
"i2sbus: failed to get soundbus dev reference\n");
- kfree(cii);
- return -ENODEV;
+ err = -ENODEV;
+ goto out_free_cii;
}
if (!try_module_get(THIS_MODULE)) {
printk(KERN_DEBUG "i2sbus: failed to get module reference!\n");
- soundbus_dev_put(dev);
- kfree(cii);
- return -EBUSY;
+ err = -EBUSY;
+ goto out_put_sdev;
}
if (!try_module_get(ci->owner)) {
printk(KERN_DEBUG
"i2sbus: failed to get module reference to codec owner!\n");
- module_put(THIS_MODULE);
- soundbus_dev_put(dev);
- kfree(cii);
- return -EBUSY;
+ err = -EBUSY;
+ goto out_put_this_module;
}
if (!dev->pcm) {
@@ -905,11 +901,7 @@ i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
&dev->pcm);
if (err) {
printk(KERN_DEBUG "i2sbus: failed to create pcm\n");
- kfree(cii);
- module_put(ci->owner);
- soundbus_dev_put(dev);
- module_put(THIS_MODULE);
- return err;
+ goto out_put_ci_module;
}
dev->pcm->dev = &dev->ofdev.dev;
}
@@ -923,20 +915,12 @@ i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
/* eh? */
printk(KERN_ERR
"Can't attach same bus to different cards!\n");
- module_put(ci->owner);
- kfree(cii);
- soundbus_dev_put(dev);
- module_put(THIS_MODULE);
- return -EINVAL;
- }
- if ((err =
- snd_pcm_new_stream(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK, 1))) {
- module_put(ci->owner);
- kfree(cii);
- soundbus_dev_put(dev);
- module_put(THIS_MODULE);
- return err;
+ err = -EINVAL;
+ goto out_put_ci_module;
}
+ err = snd_pcm_new_stream(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK, 1);
+ if (err)
+ goto out_put_ci_module;
snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
&i2sbus_playback_ops);
i2sdev->out.created = 1;
@@ -946,20 +930,11 @@ i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
if (dev->pcm->card != card) {
printk(KERN_ERR
"Can't attach same bus to different cards!\n");
- module_put(ci->owner);
- kfree(cii);
- soundbus_dev_put(dev);
- module_put(THIS_MODULE);
- return -EINVAL;
- }
- if ((err =
- snd_pcm_new_stream(dev->pcm, SNDRV_PCM_STREAM_CAPTURE, 1))) {
- module_put(ci->owner);
- kfree(cii);
- soundbus_dev_put(dev);
- module_put(THIS_MODULE);
- return err;
+ goto out_put_ci_module;
}
+ err = snd_pcm_new_stream(dev->pcm, SNDRV_PCM_STREAM_CAPTURE, 1);
+ if (err)
+ goto out_put_ci_module;
snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE,
&i2sbus_record_ops);
i2sdev->in.created = 1;
@@ -974,11 +949,7 @@ i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
err = snd_device_register(card, dev->pcm);
if (err) {
printk(KERN_ERR "i2sbus: error registering new pcm\n");
- module_put(ci->owner);
- kfree(cii);
- soundbus_dev_put(dev);
- module_put(THIS_MODULE);
- return err;
+ goto out_put_ci_module;
}
/* no errors any more, so let's add this to our list */
list_add(&cii->list, &dev->codec_list);
@@ -993,6 +964,15 @@ i2sbus_attach_codec(struct soundbus_dev *dev, struct snd_card *card,
64 * 1024, 64 * 1024);
return 0;
+ out_put_ci_module:
+ module_put(ci->owner);
+ out_put_this_module:
+ module_put(THIS_MODULE);
+ out_put_sdev:
+ soundbus_dev_put(dev);
+ out_free_cii:
+ kfree(cii);
+ return err;
}
void i2sbus_detach_codec(struct soundbus_dev *dev, void *data)