[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>
diff --git a/sound/aoa/soundbus/i2sbus/i2sbus-pcm.c b/sound/aoa/soundbus/i2sbus/i2sbus-pcm.c
index 051bb9b..7c81db7 100644
--- a/sound/aoa/soundbus/i2sbus/i2sbus-pcm.c
+++ b/sound/aoa/soundbus/i2sbus/i2sbus-pcm.c
@@ -812,7 +812,6 @@
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 @@
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 @@
&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 @@
/* 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;
+ err = -EINVAL;
+ goto out_put_ci_module;
}
- 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 = 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 @@
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;
+ goto out_put_ci_module;
}
- 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;
- }
+ 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 @@
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 @@
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)