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/fireworks/fireworks_midi.c
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@@ -1,14 +1,13 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * fireworks_midi.c - a part of driver for Fireworks based devices
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  *
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  * Copyright (c) 2009-2010 Clemens Ladisch
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  * Copyright (c) 2013-2014 Takashi Sakamoto
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- *
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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 "fireworks.h"
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-static int midi_capture_open(struct snd_rawmidi_substream *substream)
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+static int midi_open(struct snd_rawmidi_substream *substream)
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 {
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 	struct snd_efw *efw = substream->rmidi->private_data;
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 	int err;
..
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@@ -18,28 +17,13 @@
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 		goto end;
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 	mutex_lock(&efw->mutex);
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-	efw->capture_substreams++;
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-	err = snd_efw_stream_start_duplex(efw, 0);
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-	mutex_unlock(&efw->mutex);
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-	if (err < 0)
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-		snd_efw_stream_lock_release(efw);
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-
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-end:
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-	return err;
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-}
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-
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-static int midi_playback_open(struct snd_rawmidi_substream *substream)
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-{
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-	struct snd_efw *efw = substream->rmidi->private_data;
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-	int err;
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-
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-	err = snd_efw_stream_lock_try(efw);
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-	if (err < 0)
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-		goto end;
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-
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-	mutex_lock(&efw->mutex);
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-	efw->playback_substreams++;
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-	err = snd_efw_stream_start_duplex(efw, 0);
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+	err = snd_efw_stream_reserve_duplex(efw, 0, 0, 0);
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+	if (err >= 0) {
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+		++efw->substreams_counter;
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+		err = snd_efw_stream_start_duplex(efw);
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+		if (err < 0)
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+			--efw->substreams_counter;
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+	}
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 	mutex_unlock(&efw->mutex);
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 	if (err < 0)
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 		snd_efw_stream_lock_release(efw);
..
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@@ -47,25 +31,12 @@
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 	return err;
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 }
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-static int midi_capture_close(struct snd_rawmidi_substream *substream)
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+static int midi_close(struct snd_rawmidi_substream *substream)
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 {
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 	struct snd_efw *efw = substream->rmidi->private_data;
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 	mutex_lock(&efw->mutex);
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-	efw->capture_substreams--;
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-	snd_efw_stream_stop_duplex(efw);
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-	mutex_unlock(&efw->mutex);
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-
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-	snd_efw_stream_lock_release(efw);
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-	return 0;
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-}
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-
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-static int midi_playback_close(struct snd_rawmidi_substream *substream)
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-{
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-	struct snd_efw *efw = substream->rmidi->private_data;
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-
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-	mutex_lock(&efw->mutex);
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-	efw->playback_substreams--;
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+	--efw->substreams_counter;
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 	snd_efw_stream_stop_duplex(efw);
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 	mutex_unlock(&efw->mutex);
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..
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@@ -121,13 +92,13 @@
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 int snd_efw_create_midi_devices(struct snd_efw *efw)
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 {
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 	static const struct snd_rawmidi_ops capture_ops = {
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-		.open		= midi_capture_open,
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-		.close		= midi_capture_close,
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+		.open		= midi_open,
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+		.close		= midi_close,
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 		.trigger	= midi_capture_trigger,
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 	};
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 	static const struct snd_rawmidi_ops playback_ops = {
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-		.open		= midi_playback_open,
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-		.close		= midi_playback_close,
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+		.open		= midi_open,
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+		.close		= midi_close,
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 		.trigger	= midi_playback_trigger,
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 	};
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 	struct snd_rawmidi *rmidi;