修改4g拨号为QMI,需要在系统里后台执行quectel-CM

hc

2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5

 kernel/sound/firewire/oxfw/oxfw.c
..
..
@@ -1,8 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * oxfw.c - a part of driver for OXFW970/971 based devices
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  *
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  * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
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- * Licensed under the terms of the GNU General Public License, version 2.
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  */
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 #include "oxfw.h"
..
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@@ -114,35 +114,12 @@
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 	return err;
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 }
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116
 
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-static void oxfw_free(struct snd_oxfw *oxfw)
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-{
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-	unsigned int i;
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-
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-	snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->rx_stream);
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-	if (oxfw->has_output)
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-		snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->tx_stream);
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-
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-	fw_unit_put(oxfw->unit);
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-
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-	for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; i++) {
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-		kfree(oxfw->tx_stream_formats[i]);
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-		kfree(oxfw->rx_stream_formats[i]);
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-	}
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-
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-	kfree(oxfw->spec);
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-	mutex_destroy(&oxfw->mutex);
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-	kfree(oxfw);
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-}
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-
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-/*
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- * This module releases the FireWire unit data after all ALSA character devices
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- * are released by applications. This is for releasing stream data or finishing
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- * transactions safely. Thus at returning from .remove(), this module still keep
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- * references for the unit.
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- */
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 static void oxfw_card_free(struct snd_card *card)
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 {
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-	oxfw_free(card->private_data);
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+	struct snd_oxfw *oxfw = card->private_data;
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+
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+	if (oxfw->has_output || oxfw->has_input)
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+		snd_oxfw_stream_destroy_duplex(oxfw);
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 }
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 static int detect_quirks(struct snd_oxfw *oxfw)
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@@ -206,7 +183,6 @@
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 static void do_registration(struct work_struct *work)
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 {
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 	struct snd_oxfw *oxfw = container_of(work, struct snd_oxfw, dwork.work);
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-	int i;
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 	int err;
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187
 
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 	if (oxfw->registered)
..
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@@ -216,6 +192,8 @@
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 			   &oxfw->card);
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 	if (err < 0)
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 		return;
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+	oxfw->card->private_free = oxfw_card_free;
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+	oxfw->card->private_data = oxfw;
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 	err = name_card(oxfw);
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 	if (err < 0)
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@@ -229,55 +207,35 @@
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 	if (err < 0)
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 		goto error;
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209
 
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-	err = snd_oxfw_stream_init_simplex(oxfw, &oxfw->rx_stream);
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-	if (err < 0)
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-		goto error;
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-	if (oxfw->has_output) {
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-		err = snd_oxfw_stream_init_simplex(oxfw, &oxfw->tx_stream);
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+	if (oxfw->has_output || oxfw->has_input) {
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+		err = snd_oxfw_stream_init_duplex(oxfw);
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+		if (err < 0)
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+			goto error;
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+
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+		err = snd_oxfw_create_pcm(oxfw);
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+		if (err < 0)
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+			goto error;
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+
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+		snd_oxfw_proc_init(oxfw);
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+
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+		err = snd_oxfw_create_midi(oxfw);
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+		if (err < 0)
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+			goto error;
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+
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+		err = snd_oxfw_create_hwdep(oxfw);
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 		if (err < 0)
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 			goto error;
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 	}
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-
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-	err = snd_oxfw_create_pcm(oxfw);
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-	if (err < 0)
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-		goto error;
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-
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-	snd_oxfw_proc_init(oxfw);
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-
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-	err = snd_oxfw_create_midi(oxfw);
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-	if (err < 0)
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-		goto error;
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-
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-	err = snd_oxfw_create_hwdep(oxfw);
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-	if (err < 0)
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-		goto error;
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229
 
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 	err = snd_card_register(oxfw->card);
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231
 	if (err < 0)
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232
 		goto error;
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233
 
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-	/*
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-	 * After registered, oxfw instance can be released corresponding to
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-	 * releasing the sound card instance.
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-	 */
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-	oxfw->card->private_free = oxfw_card_free;
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-	oxfw->card->private_data = oxfw;
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234
 	oxfw->registered = true;
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235
 
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 	return;
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237
 error:
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-	snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->rx_stream);
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-	if (oxfw->has_output)
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-		snd_oxfw_stream_destroy_simplex(oxfw, &oxfw->tx_stream);
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-	for (i = 0; i < SND_OXFW_STREAM_FORMAT_ENTRIES; ++i) {
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-		kfree(oxfw->tx_stream_formats[i]);
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-		oxfw->tx_stream_formats[i] = NULL;
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-		kfree(oxfw->rx_stream_formats[i]);
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-		oxfw->rx_stream_formats[i] = NULL;
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-	}
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 	snd_card_free(oxfw->card);
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-	kfree(oxfw->spec);
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-	oxfw->spec = NULL;
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 	dev_info(&oxfw->unit->device,
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 		 "Sound card registration failed: %d\n", err);
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 }
..
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@@ -291,14 +249,13 @@
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 		return -ENODEV;
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250
 
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 	/* Allocate this independent of sound card instance. */
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-	oxfw = kzalloc(sizeof(struct snd_oxfw), GFP_KERNEL);
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-	if (oxfw == NULL)
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+	oxfw = devm_kzalloc(&unit->device, sizeof(struct snd_oxfw), GFP_KERNEL);
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+	if (!oxfw)
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 		return -ENOMEM;
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-
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-	oxfw->entry = entry;
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 	oxfw->unit = fw_unit_get(unit);
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 	dev_set_drvdata(&unit->device, oxfw);
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257
 
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+	oxfw->entry = entry;
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 	mutex_init(&oxfw->mutex);
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 	spin_lock_init(&oxfw->lock);
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 	init_waitqueue_head(&oxfw->hwdep_wait);
..
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@@ -320,13 +277,11 @@
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 	fcp_bus_reset(oxfw->unit);
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278
 
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 	if (oxfw->registered) {
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-		mutex_lock(&oxfw->mutex);
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-
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-		snd_oxfw_stream_update_simplex(oxfw, &oxfw->rx_stream);
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-		if (oxfw->has_output)
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-			snd_oxfw_stream_update_simplex(oxfw, &oxfw->tx_stream);
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-
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-		mutex_unlock(&oxfw->mutex);
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+		if (oxfw->has_output || oxfw->has_input) {
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+			mutex_lock(&oxfw->mutex);
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+			snd_oxfw_stream_update_duplex(oxfw);
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+			mutex_unlock(&oxfw->mutex);
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+		}
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285
 
331
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 		if (oxfw->entry->vendor_id == OUI_STANTON)
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 			snd_oxfw_scs1x_update(oxfw);
..
..
@@ -345,12 +300,12 @@
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 	cancel_delayed_work_sync(&oxfw->dwork);
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301
 
347
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 	if (oxfw->registered) {
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-		/* No need to wait for releasing card object in this context. */
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-		snd_card_free_when_closed(oxfw->card);
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-	} else {
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-		/* Don't forget this case. */
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-		oxfw_free(oxfw);
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+		// Block till all of ALSA character devices are released.
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+		snd_card_free(oxfw->card);
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 	}
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+
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+	mutex_destroy(&oxfw->mutex);
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+	fw_unit_put(oxfw->unit);
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 }
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310
 
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 static const struct compat_info griffin_firewave = {