ALSA: nm256: Fix assignment in if condition

PCI NM256 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.

Link: https://lore.kernel.org/r/20210608140540.17885-46-tiwai@suse.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/nm256/nm256.c

@@ -1318,7 +1318,8 @@ snd_nm256_mixer(struct nm256 *chip)
 	if (! chip->ac97_regs)
 		return -ENOMEM;
 
-	if ((err = snd_ac97_bus(chip->card, 0, &ops, NULL, &pbus)) < 0)
+	err = snd_ac97_bus(chip->card, 0, &ops, NULL, &pbus);
+	if (err < 0)
 		return err;
 
 	memset(&ac97, 0, sizeof(ac97));
@@ -1476,7 +1477,8 @@ snd_nm256_create(struct snd_card *card, struct pci_dev *pci,
 
 	*chip_ret = NULL;
 
-	if ((err = pci_enable_device(pci)) < 0)
+	err = pci_enable_device(pci);
+	if (err < 0)
 		return err;
 
 	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
@@ -1568,7 +1570,8 @@ snd_nm256_create(struct snd_card *card, struct pci_dev *pci,
 		chip->buffer_end = buffer_top;
 	else {
 		/* get buffer end pointer from signature */
-		if ((err = snd_nm256_peek_for_sig(chip)) < 0)
+		err = snd_nm256_peek_for_sig(chip);
+		if (err < 0)
 			goto __error;
 	}
 
@@ -1618,7 +1621,8 @@ snd_nm256_create(struct snd_card *card, struct pci_dev *pci,
 
 	// pci_set_master(pci); /* needed? */
 	
-	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0)
+	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
+	if (err < 0)
 		goto __error;
 
 	*chip_ret = chip;
@@ -1700,7 +1704,8 @@ static int snd_nm256_probe(struct pci_dev *pci,
 		capture_bufsize = 4;
 	if (capture_bufsize > 128)
 		capture_bufsize = 128;
-	if ((err = snd_nm256_create(card, pci, &chip)) < 0) {
+	err = snd_nm256_create(card, pci, &chip);
+	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}
@@ -1716,8 +1721,13 @@ static int snd_nm256_probe(struct pci_dev *pci,
 		chip->reset_workaround_2 = 1;
 	}
 
-	if ((err = snd_nm256_pcm(chip, 0)) < 0 ||
-	    (err = snd_nm256_mixer(chip)) < 0) {
+	err = snd_nm256_pcm(chip, 0);
+	if (err < 0) {
+		snd_card_free(card);
+		return err;
+	}
+	err = snd_nm256_mixer(chip);
+	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}
@@ -1727,7 +1737,8 @@ static int snd_nm256_probe(struct pci_dev *pci,
 		card->shortname,
 		chip->buffer_addr, chip->cport_addr, chip->irq);
 
-	if ((err = snd_card_register(card)) < 0) {
+	err = snd_card_register(card);
+	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}