[PATCH 59/66] ALSA: mpu401: Fix assignment in if condition

[Takashi Iwai <tiwai@xxxxxxx>]

MPU401 driver code contains a few assignments in if condition, which
is a bad coding style that may confuse readers and occasionally lead
to bugs.

This patch is merely for coding-style fixes, no functional changes.

Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
 sound/drivers/mpu401/mpu401.c      |  9 ++++++---
 sound/drivers/mpu401/mpu401_uart.c | 19 +++++++++++++------
 2 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/sound/drivers/mpu401/mpu401.c b/sound/drivers/mpu401/mpu401.c
index 8c552e25805a..d0b55dbb411a 100644
--- a/sound/drivers/mpu401/mpu401.c
+++ b/sound/drivers/mpu401/mpu401.c
@@ -104,7 +104,8 @@ static int snd_mpu401_probe(struct platform_device *devptr)
 	err = snd_mpu401_create(&devptr->dev, dev, &card);
 	if (err < 0)
 		return err;
-	if ((err = snd_card_register(card)) < 0) {
+	err = snd_card_register(card);
+	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}
@@ -182,7 +183,8 @@ static int snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev,
 		err = snd_mpu401_create(&pnp_dev->dev, dev, &card);
 		if (err < 0)
 			return err;
-		if ((err = snd_card_register(card)) < 0) {
+		err = snd_card_register(card);
+		if (err < 0) {
 			snd_card_free(card);
 			return err;
 		}
@@ -227,7 +229,8 @@ static int __init alsa_card_mpu401_init(void)
 {
 	int i, err;
 
-	if ((err = platform_driver_register(&snd_mpu401_driver)) < 0)
+	err = platform_driver_register(&snd_mpu401_driver);
+	if (err < 0)
 		return err;
 
 	for (i = 0; i < SNDRV_CARDS; i++) {
diff --git a/sound/drivers/mpu401/mpu401_uart.c b/sound/drivers/mpu401/mpu401_uart.c
index 65982d6babfc..f435b9b4ae24 100644
--- a/sound/drivers/mpu401/mpu401_uart.c
+++ b/sound/drivers/mpu401/mpu401_uart.c
@@ -271,8 +271,11 @@ static int snd_mpu401_uart_input_open(struct snd_rawmidi_substream *substream)
 	int err;
 
 	mpu = substream->rmidi->private_data;
-	if (mpu->open_input && (err = mpu->open_input(mpu)) < 0)
-		return err;
+	if (mpu->open_input) {
+		err = mpu->open_input(mpu);
+		if (err < 0)
+			return err;
+	}
 	if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode)) {
 		if (snd_mpu401_do_reset(mpu) < 0)
 			goto error_out;
@@ -293,8 +296,11 @@ static int snd_mpu401_uart_output_open(struct snd_rawmidi_substream *substream)
 	int err;
 
 	mpu = substream->rmidi->private_data;
-	if (mpu->open_output && (err = mpu->open_output(mpu)) < 0)
-		return err;
+	if (mpu->open_output) {
+		err = mpu->open_output(mpu);
+		if (err < 0)
+			return err;
+	}
 	if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) {
 		if (snd_mpu401_do_reset(mpu) < 0)
 			goto error_out;
@@ -524,8 +530,9 @@ int snd_mpu401_uart_new(struct snd_card *card, int device,
 		info_flags |= MPU401_INFO_INPUT | MPU401_INFO_OUTPUT;
 	in_enable = (info_flags & MPU401_INFO_INPUT) ? 1 : 0;
 	out_enable = (info_flags & MPU401_INFO_OUTPUT) ? 1 : 0;
-	if ((err = snd_rawmidi_new(card, "MPU-401U", device,
-				   out_enable, in_enable, &rmidi)) < 0)
+	err = snd_rawmidi_new(card, "MPU-401U", device,
+			      out_enable, in_enable, &rmidi);
+	if (err < 0)
 		return err;
 	mpu = kzalloc(sizeof(*mpu), GFP_KERNEL);
 	if (!mpu) {
-- 
2.26.2