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ALSA: fireworks: use managed-resource to maintain response buffer

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ALSA fireworks driver allocates memory object to handle response from
target unit. The object is used to initiate transaction unique to
Fireworks board module. This can be released as managed-resource
of 'struct snd_card.card_dev'.

This commit uses managed-resource of the sound card device for this
purpose.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2018-10-03 08:21:52 +09:00 committed by Takashi Iwai
parent a3aaf7d2bd
commit 784fffbcfe
1 changed files with 3 additions and 6 deletions
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9
sound/firewire/fireworks/fireworks.c
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@ -189,8 +189,6 @@ static void efw_free(struct snd_efw *efw)
snd_efw_stream_destroy_duplex(efw);
snd_efw_transaction_remove_instance(efw);
kfree(efw->resp_buf);
mutex_destroy(&efw->mutex);
fw_unit_put(efw->unit);
}
@ -247,8 +245,9 @@ do_registration(struct work_struct *work)
/* prepare response buffer */
snd_efw_resp_buf_size = clamp(snd_efw_resp_buf_size,
SND_EFW_RESPONSE_MAXIMUM_BYTES, 4096U);
efw->resp_buf = kzalloc(snd_efw_resp_buf_size, GFP_KERNEL);
if (efw->resp_buf == NULL) {
efw->resp_buf = devm_kzalloc(&efw->card->card_dev,
snd_efw_resp_buf_size, GFP_KERNEL);
if (!efw->resp_buf) {
err = -ENOMEM;
goto error;
}
@ -300,8 +299,6 @@ error:
snd_efw_transaction_remove_instance(efw);
snd_efw_stream_destroy_duplex(efw);
snd_card_free(efw->card);
kfree(efw->resp_buf);
efw->resp_buf = NULL;
dev_info(&efw->unit->device,
"Sound card registration failed: %d\n", err);
}