ALSA: emu10k1: remove superfluous IRQ enable state saving

The mixer, PCM prepare, MIDI, synth driver, and procfs callbacks are all
always invoked with IRQs enabled, so there is no point in saving the
state.

snd_emu1010_load_firmware_entry() is called from emu1010_firmware_work()
and snd_emu10k1_emu1010_init(); the latter from snd_emu10k1_create() and
snd_emu10k1_resume(), all of which have IRQs enabled.

The voice and memory functions are called from mixed contexts, so they
keep the state saving.

The low-level functions all keep the state saving, because it's not
feasible to keep track of what is called where.

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230712145750.125086-2-oswald.buddenhagen@gmx.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 17 insertions, 23 deletions

diff --git a/sound/pci/emu10k1/emumpu401.c b/sound/pci/emu10k1/emumpu401.c
index 3ce9b2129ce6..747c34b3d566 100644
--- a/sound/pci/emu10k1/emumpu401.c
+++ b/sound/pci/emu10k1/emumpu401.c
@@ -104,10 +104,9 @@ static void snd_emu10k1_midi_interrupt2(struct snd_emu10k1 *emu, unsigned int st
 
 static int snd_emu10k1_midi_cmd(struct snd_emu10k1 * emu, struct snd_emu10k1_midi *midi, unsigned char cmd, int ack)
 {
-	unsigned long flags;
 	int timeout, ok;
 
-	spin_lock_irqsave(&midi->input_lock, flags);
+	spin_lock_irq(&midi->input_lock);
 	mpu401_write_data(emu, midi, 0x00);
 	/* mpu401_clear_rx(emu, midi); */
 
@@ -126,7 +125,7 @@ static int snd_emu10k1_midi_cmd(struct snd_emu10k1 * emu, struct snd_emu10k1_mid
 	} else {
 		ok = 1;
 	}
-	spin_unlock_irqrestore(&midi->input_lock, flags);
+	spin_unlock_irq(&midi->input_lock);
 	if (!ok) {
 		dev_err(emu->card->dev,
 			"midi_cmd: 0x%x failed at 0x%lx (status = 0x%x, data = 0x%x)!!!\n",
@@ -142,22 +141,21 @@ static int snd_emu10k1_midi_input_open(struct snd_rawmidi_substream *substream)
 {
 	struct snd_emu10k1 *emu;
 	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
-	unsigned long flags;
 
 	emu = midi->emu;
 	if (snd_BUG_ON(!emu))
 		return -ENXIO;
-	spin_lock_irqsave(&midi->open_lock, flags);
+	spin_lock_irq(&midi->open_lock);
 	midi->midi_mode |= EMU10K1_MIDI_MODE_INPUT;
 	midi->substream_input = substream;
 	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
-		spin_unlock_irqrestore(&midi->open_lock, flags);
+		spin_unlock_irq(&midi->open_lock);
 		if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1))
 			goto error_out;
 		if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
 			goto error_out;
 	} else {
-		spin_unlock_irqrestore(&midi->open_lock, flags);
+		spin_unlock_irq(&midi->open_lock);
 	}
 	return 0;
 
@@ -169,22 +167,21 @@ static int snd_emu10k1_midi_output_open(struct snd_rawmidi_substream *substream)
 {
 	struct snd_emu10k1 *emu;
 	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
-	unsigned long flags;
 
 	emu = midi->emu;
 	if (snd_BUG_ON(!emu))
 		return -ENXIO;
-	spin_lock_irqsave(&midi->open_lock, flags);
+	spin_lock_irq(&midi->open_lock);
 	midi->midi_mode |= EMU10K1_MIDI_MODE_OUTPUT;
 	midi->substream_output = substream;
 	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
-		spin_unlock_irqrestore(&midi->open_lock, flags);
+		spin_unlock_irq(&midi->open_lock);
 		if (snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 1))
 			goto error_out;
 		if (snd_emu10k1_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
 			goto error_out;
 	} else {
-		spin_unlock_irqrestore(&midi->open_lock, flags);
+		spin_unlock_irq(&midi->open_lock);
 	}
 	return 0;
 
@@ -196,21 +193,20 @@ static int snd_emu10k1_midi_input_close(struct snd_rawmidi_substream *substream)
 {
 	struct snd_emu10k1 *emu;
 	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
-	unsigned long flags;
 	int err = 0;
 
 	emu = midi->emu;
 	if (snd_BUG_ON(!emu))
 		return -ENXIO;
-	spin_lock_irqsave(&midi->open_lock, flags);
+	spin_lock_irq(&midi->open_lock);
 	snd_emu10k1_intr_disable(emu, midi->rx_enable);
 	midi->midi_mode &= ~EMU10K1_MIDI_MODE_INPUT;
 	midi->substream_input = NULL;
 	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT)) {
-		spin_unlock_irqrestore(&midi->open_lock, flags);
+		spin_unlock_irq(&midi->open_lock);
 		err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
 	} else {
-		spin_unlock_irqrestore(&midi->open_lock, flags);
+		spin_unlock_irq(&midi->open_lock);
 	}
 	return err;
 }
@@ -219,21 +215,20 @@ static int snd_emu10k1_midi_output_close(struct snd_rawmidi_substream *substream
 {
 	struct snd_emu10k1 *emu;
 	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
-	unsigned long flags;
 	int err = 0;
 
 	emu = midi->emu;
 	if (snd_BUG_ON(!emu))
 		return -ENXIO;
-	spin_lock_irqsave(&midi->open_lock, flags);
+	spin_lock_irq(&midi->open_lock);
 	snd_emu10k1_intr_disable(emu, midi->tx_enable);
 	midi->midi_mode &= ~EMU10K1_MIDI_MODE_OUTPUT;
 	midi->substream_output = NULL;
 	if (!(midi->midi_mode & EMU10K1_MIDI_MODE_INPUT)) {
-		spin_unlock_irqrestore(&midi->open_lock, flags);
+		spin_unlock_irq(&midi->open_lock);
 		err = snd_emu10k1_midi_cmd(emu, midi, MPU401_RESET, 0);
 	} else {
-		spin_unlock_irqrestore(&midi->open_lock, flags);
+		spin_unlock_irq(&midi->open_lock);
 	}
 	return err;
 }
@@ -256,7 +251,6 @@ static void snd_emu10k1_midi_output_trigger(struct snd_rawmidi_substream *substr
 {
 	struct snd_emu10k1 *emu;
 	struct snd_emu10k1_midi *midi = (struct snd_emu10k1_midi *)substream->rmidi->private_data;
-	unsigned long flags;
 
 	emu = midi->emu;
 	if (snd_BUG_ON(!emu))
@@ -267,13 +261,13 @@ static void snd_emu10k1_midi_output_trigger(struct snd_rawmidi_substream *substr
 		unsigned char byte;
 	
 		/* try to send some amount of bytes here before interrupts */
-		spin_lock_irqsave(&midi->output_lock, flags);
+		spin_lock_irq(&midi->output_lock);
 		while (max > 0) {
 			if (mpu401_output_ready(emu, midi)) {
 				if (!(midi->midi_mode & EMU10K1_MIDI_MODE_OUTPUT) ||
 				    snd_rawmidi_transmit(substream, &byte, 1) != 1) {
 					/* no more data */
-					spin_unlock_irqrestore(&midi->output_lock, flags);
+					spin_unlock_irq(&midi->output_lock);
 					return;
 				}
 				mpu401_write_data(emu, midi, byte);
@@ -282,7 +276,7 @@ static void snd_emu10k1_midi_output_trigger(struct snd_rawmidi_substream *substr
 				break;
 			}
 		}
-		spin_unlock_irqrestore(&midi->output_lock, flags);
+		spin_unlock_irq(&midi->output_lock);
 		snd_emu10k1_intr_enable(emu, midi->tx_enable);
 	} else {
 		snd_emu10k1_intr_disable(emu, midi->tx_enable);