From 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 22 Oct 2024 10:36:11 +0000
Subject: [PATCH] 修改4g拨号为QMI,需要在系统里后台执行quectel-CM
---
kernel/sound/firewire/fireworks/fireworks.c | 74 +++++++++++--------------------------
1 files changed, 22 insertions(+), 52 deletions(-)
diff --git a/kernel/sound/firewire/fireworks/fireworks.c b/kernel/sound/firewire/fireworks/fireworks.c
index f2d0733..b1cc013 100644
--- a/kernel/sound/firewire/fireworks/fireworks.c
+++ b/kernel/sound/firewire/fireworks/fireworks.c
@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* fireworks.c - a part of driver for Fireworks based devices
*
* Copyright (c) 2009-2010 Clemens Ladisch
* Copyright (c) 2013-2014 Takashi Sakamoto
- *
- * Licensed under the terms of the GNU General Public License, version 2.
*/
/*
@@ -184,36 +183,17 @@
return err;
}
-static void efw_free(struct snd_efw *efw)
-{
- snd_efw_stream_destroy_duplex(efw);
- snd_efw_transaction_remove_instance(efw);
- fw_unit_put(efw->unit);
-
- kfree(efw->resp_buf);
-
- mutex_destroy(&efw->mutex);
- kfree(efw);
-}
-
-/*
- * 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
efw_card_free(struct snd_card *card)
{
struct snd_efw *efw = card->private_data;
- if (efw->card_index >= 0) {
- mutex_lock(&devices_mutex);
- clear_bit(efw->card_index, devices_used);
- mutex_unlock(&devices_mutex);
- }
+ mutex_lock(&devices_mutex);
+ clear_bit(efw->card_index, devices_used);
+ mutex_unlock(&devices_mutex);
- efw_free(card->private_data);
+ snd_efw_stream_destroy_duplex(efw);
+ snd_efw_transaction_remove_instance(efw);
}
static void
@@ -226,9 +206,8 @@
if (efw->registered)
return;
- mutex_lock(&devices_mutex);
-
/* check registered cards */
+ mutex_lock(&devices_mutex);
for (card_index = 0; card_index < SNDRV_CARDS; ++card_index) {
if (!test_bit(card_index, devices_used) && enable[card_index])
break;
@@ -244,12 +223,18 @@
mutex_unlock(&devices_mutex);
return;
}
+ set_bit(card_index, devices_used);
+ mutex_unlock(&devices_mutex);
+
+ efw->card->private_free = efw_card_free;
+ efw->card->private_data = efw;
/* 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;
}
@@ -284,25 +269,11 @@
if (err < 0)
goto error;
- set_bit(card_index, devices_used);
- mutex_unlock(&devices_mutex);
-
- /*
- * After registered, efw instance can be released corresponding to
- * releasing the sound card instance.
- */
- efw->card->private_free = efw_card_free;
- efw->card->private_data = efw;
efw->registered = true;
return;
error:
- mutex_unlock(&devices_mutex);
- 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);
}
@@ -312,10 +283,9 @@
{
struct snd_efw *efw;
- efw = kzalloc(sizeof(struct snd_efw), GFP_KERNEL);
+ efw = devm_kzalloc(&unit->device, sizeof(struct snd_efw), GFP_KERNEL);
if (efw == NULL)
return -ENOMEM;
-
efw->unit = fw_unit_get(unit);
dev_set_drvdata(&unit->device, efw);
@@ -363,12 +333,12 @@
cancel_delayed_work_sync(&efw->dwork);
if (efw->registered) {
- /* No need to wait for releasing card object in this context. */
- snd_card_free_when_closed(efw->card);
- } else {
- /* Don't forget this case. */
- efw_free(efw);
+ // Block till all of ALSA character devices are released.
+ snd_card_free(efw->card);
}
+
+ mutex_destroy(&efw->mutex);
+ fw_unit_put(efw->unit);
}
static const struct ieee1394_device_id efw_id_table[] = {
@@ -392,7 +362,7 @@
static struct fw_driver efw_driver = {
.driver = {
.owner = THIS_MODULE,
- .name = "snd-fireworks",
+ .name = KBUILD_MODNAME,
.bus = &fw_bus_type,
},
.probe = efw_probe,
--
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