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ALSA: firewire: simplify cleanup process when failing to register sound card

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In former commits, .private_free callback releases resources just for
data transmission. This release function can be called without the
resources are actually allocated in error paths.

This commit applies a small refactoring to clean up codes in error
paths.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto
2018-10-10 15:35:02 +09:00
committed by Takashi Iwai
parent 873608dc6b
commit 3babca4555
8 changed files with 49 additions and 143 deletions
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26
sound/firewire/oxfw/oxfw.c
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@@ -113,24 +113,15 @@ end:
return err;
}
static void oxfw_free(struct snd_oxfw *oxfw)
static void oxfw_card_free(struct snd_card *card)
{
struct snd_oxfw *oxfw = card->private_data;
snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->rx_stream);
if (oxfw->has_output)
snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->tx_stream);
}
/*
* This module releases the FireWire unit data after all ALSA character devices
* are released by applications. This is for releasing stream data or finishing
* transactions safely. Thus at returning from .remove(), this module still keep
* references for the unit.
*/
static void oxfw_card_free(struct snd_card *card)
{
oxfw_free(card->private_data);
}
static int detect_quirks(struct snd_oxfw *oxfw)
{
struct fw_device *fw_dev = fw_parent_device(oxfw->unit);
@@ -204,6 +195,8 @@ static void do_registration(struct work_struct *work)
&oxfw->card);
if (err < 0)
return;
oxfw->card->private_free = oxfw_card_free;
oxfw->card->private_data = oxfw;
err = name_card(oxfw);
if (err < 0)
@@ -244,19 +237,10 @@ static void do_registration(struct work_struct *work)
if (err < 0)
goto error;
/*
* After registered, oxfw instance can be released corresponding to
* releasing the sound card instance.
*/
oxfw->card->private_free = oxfw_card_free;
oxfw->card->private_data = oxfw;
oxfw->registered = true;
return;
error:
snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->rx_stream);
if (oxfw->has_output)
snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->tx_stream);
snd_card_free(oxfw->card);
dev_info(&oxfw->unit->device,
"Sound card registration failed: %d\n", err);