[PATCH 0/3] ALSA: ens1370: Fine-tuning for six function implementations

[PATCH 0/3] ALSA: ens1370: Fine-tuning for six function implementations

[SF Markus Elfring]

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Tue, 14 Nov 2017 18:38:28 +0100

A few update suggestions were taken into account
from static source code analysis.

Markus Elfring (3):
  Adjust 15 function calls together with a variable assignment
  Use common error handling code in snd_audiopci_probe()
  Use common error handling code in snd_ensoniq_create()

 sound/pci/ens1370.c | 110 +++++++++++++++++++++++++++++-----------------------
 1 file changed, 61 insertions(+), 49 deletions(-)

-- 
2.15.0

[PATCH 1/3] ALSA: ens1370: Adjust 15 function calls together with a variable assignment

[SF Markus Elfring]

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Tue, 14 Nov 2017 18:08:57 +0100

The script "checkpatch.pl" pointed information out like the following.

ERROR: do not use assignment in if condition

Thus fix the affected source code places.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 sound/pci/ens1370.c | 48 +++++++++++++++++++++++++++++++-----------------
 1 file changed, 31 insertions(+), 17 deletions(-)

diff --git a/sound/pci/ens1370.c b/sound/pci/ens1370.c
index 39f79a6b5283..7cd7cacdcc28 100644
--- a/sound/pci/ens1370.c
+++ b/sound/pci/ens1370.c
@@ -694,7 +694,8 @@ static unsigned short snd_es1371_codec_read(struct snd_ac97 *ac97,
 			}
 			/* now wait for the stinkin' data (RDY) */
 			for (t = 0; t < POLL_COUNT; t++) {
-				if ((x = inl(ES_REG(ensoniq, 1371_CODEC))) & ES_1371_CODEC_RDY) {
+				x = inl(ES_REG(ensoniq, 1371_CODEC));
+				if (x & ES_1371_CODEC_RDY) {
 					if (is_ev1938(ensoniq)) {
 						for (t = 0; t < 100; t++)
 							inl(ES_REG(ensoniq, CONTROL));
@@ -1636,7 +1637,8 @@ static int snd_ensoniq_1371_mixer(struct ensoniq *ensoniq,
 		.wait = snd_es1371_codec_wait,
 	};
 
-	if ((err = snd_ac97_bus(card, 0, &ops, NULL, &pbus)) < 0)
+	err = snd_ac97_bus(card, 0, &ops, NULL, &pbus);
+	if (err < 0)
 		return err;
 
 	memset(&ac97, 0, sizeof(ac97));
@@ -1644,7 +1646,8 @@ static int snd_ensoniq_1371_mixer(struct ensoniq *ensoniq,
 	ac97.private_free = snd_ensoniq_mixer_free_ac97;
 	ac97.pci = ensoniq->pci;
 	ac97.scaps = AC97_SCAP_AUDIO;
-	if ((err = snd_ac97_mixer(pbus, &ac97, &ensoniq->u.es1371.ac97)) < 0)
+	err = snd_ac97_mixer(pbus, &ac97, &ensoniq->u.es1371.ac97);
+	if (err < 0)
 		return err;
 	if (has_spdif > 0 ||
 	    (!has_spdif && es1371_quirk_lookup(ensoniq, es1371_spdif_present))) {
@@ -1764,7 +1767,8 @@ static int snd_ensoniq_1370_mixer(struct ensoniq *ensoniq)
 	ak4531.write = snd_es1370_codec_write;
 	ak4531.private_data = ensoniq;
 	ak4531.private_free = snd_ensoniq_mixer_free_ak4531;
-	if ((err = snd_ak4531_mixer(card, &ak4531, &ensoniq->u.es1370.ak4531)) < 0)
+	err = snd_ak4531_mixer(card, &ak4531, &ensoniq->u.es1370.ak4531);
+	if (err < 0)
 		return err;
 	for (idx = 0; idx < ES1370_CONTROLS; idx++) {
 		err = snd_ctl_add(card, snd_ctl_new1(&snd_es1370_controls[idx], ensoniq));
@@ -2088,7 +2092,8 @@ static int snd_ensoniq_create(struct snd_card *card,
 	};
 
 	*rensoniq = NULL;
-	if ((err = pci_enable_device(pci)) < 0)
+	err = pci_enable_device(pci);
+	if (err < 0)
 		return err;
 	ensoniq = kzalloc(sizeof(*ensoniq), GFP_KERNEL);
 	if (ensoniq == NULL) {
@@ -2100,7 +2105,8 @@ static int snd_ensoniq_create(struct snd_card *card,
 	ensoniq->card = card;
 	ensoniq->pci = pci;
 	ensoniq->irq = -1;
-	if ((err = pci_request_regions(pci, "Ensoniq AudioPCI")) < 0) {
+	err = pci_request_regions(pci, "Ensoniq AudioPCI");
+	if (err < 0) {
 		kfree(ensoniq);
 		pci_disable_device(pci);
 		return err;
@@ -2143,8 +2149,8 @@ static int snd_ensoniq_create(struct snd_card *card,
 #endif
 
 	snd_ensoniq_chip_init(ensoniq);
-
-	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, ensoniq, &ops)) < 0) {
+	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, ensoniq, &ops);
+	if (err < 0) {
 		snd_ensoniq_free(ensoniq);
 		return err;
 	}
@@ -2333,9 +2339,10 @@ static const struct snd_rawmidi_ops snd_ensoniq_midi_input =
 static int snd_ensoniq_midi(struct ensoniq *ensoniq, int device)
 {
 	struct snd_rawmidi *rmidi;
-	int err;
+	int err = snd_rawmidi_new(ensoniq->card, "ES1370/1",
+				  device, 1, 1, &rmidi);
 
-	if ((err = snd_rawmidi_new(ensoniq->card, "ES1370/1", device, 1, 1, &rmidi)) < 0)
+	if (err < 0)
 		return err;
 	strcpy(rmidi->name, CHIP_NAME);
 	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_ensoniq_midi_output);
@@ -2406,7 +2413,8 @@ static int snd_audiopci_probe(struct pci_dev *pci,
 	if (err < 0)
 		return err;
 
-	if ((err = snd_ensoniq_create(card, pci, &ensoniq)) < 0) {
+	err = snd_ensoniq_create(card, pci, &ensoniq);
+	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}
@@ -2414,26 +2422,31 @@ static int snd_audiopci_probe(struct pci_dev *pci,
 
 	pcm_devs[0] = 0; pcm_devs[1] = 1;
 #ifdef CHIP1370
-	if ((err = snd_ensoniq_1370_mixer(ensoniq)) < 0) {
+	err = snd_ensoniq_1370_mixer(ensoniq);
+	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}
 #endif
 #ifdef CHIP1371
-	if ((err = snd_ensoniq_1371_mixer(ensoniq, spdif[dev], lineio[dev])) < 0) {
+	err = snd_ensoniq_1371_mixer(ensoniq, spdif[dev], lineio[dev]);
+	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}
 #endif
-	if ((err = snd_ensoniq_pcm(ensoniq, 0)) < 0) {
+	err = snd_ensoniq_pcm(ensoniq, 0);
+	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}
-	if ((err = snd_ensoniq_pcm2(ensoniq, 1)) < 0) {
+	err = snd_ensoniq_pcm2(ensoniq, 1);
+	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}
-	if ((err = snd_ensoniq_midi(ensoniq, 0)) < 0) {
+	err = snd_ensoniq_midi(ensoniq, 0);
+	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}
@@ -2449,7 +2462,8 @@ static int snd_audiopci_probe(struct pci_dev *pci,
 		ensoniq->port,
 		ensoniq->irq);
 
-	if ((err = snd_card_register(card)) < 0) {
+	err = snd_card_register(card);
+	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}
-- 
2.15.0

[PATCH 2/3] ALSA: ens1370: Use common error handling code in snd_audiopci_probe()

[SF Markus Elfring]

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Tue, 14 Nov 2017 18:15:36 +0100

Add a jump target so that a bit of exception handling can be better reused
at the end of this function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 sound/pci/ens1370.c | 49 +++++++++++++++++++++----------------------------
 1 file changed, 21 insertions(+), 28 deletions(-)

diff --git a/sound/pci/ens1370.c b/sound/pci/ens1370.c
index 7cd7cacdcc28..55c5173036d3 100644
--- a/sound/pci/ens1370.c
+++ b/sound/pci/ens1370.c
@@ -2414,42 +2414,33 @@ static int snd_audiopci_probe(struct pci_dev *pci,
 		return err;
 
 	err = snd_ensoniq_create(card, pci, &ensoniq);
-	if (err < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if (err < 0)
+		goto free_card;
+
 	card->private_data = ensoniq;
 
 	pcm_devs[0] = 0; pcm_devs[1] = 1;
 #ifdef CHIP1370
 	err = snd_ensoniq_1370_mixer(ensoniq);
-	if (err < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if (err < 0)
+		goto free_card;
 #endif
 #ifdef CHIP1371
 	err = snd_ensoniq_1371_mixer(ensoniq, spdif[dev], lineio[dev]);
-	if (err < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if (err < 0)
+		goto free_card;
 #endif
 	err = snd_ensoniq_pcm(ensoniq, 0);
-	if (err < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if (err < 0)
+		goto free_card;
+
 	err = snd_ensoniq_pcm2(ensoniq, 1);
-	if (err < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if (err < 0)
+		goto free_card;
+
 	err = snd_ensoniq_midi(ensoniq, 0);
-	if (err < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if (err < 0)
+		goto free_card;
 
 	snd_ensoniq_create_gameport(ensoniq, dev);
 
@@ -2463,14 +2454,16 @@ static int snd_audiopci_probe(struct pci_dev *pci,
 		ensoniq->irq);
 
 	err = snd_card_register(card);
-	if (err < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if (err < 0)
+		goto free_card;
 
 	pci_set_drvdata(pci, card);
 	dev++;
 	return 0;
+
+free_card:
+	snd_card_free(card);
+	return err;
 }
 
 static void snd_audiopci_remove(struct pci_dev *pci)
-- 
2.15.0

[PATCH 3/3] ALSA: ens1370: Use common error handling code in snd_ensoniq_create()

[SF Markus Elfring]

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Tue, 14 Nov 2017 18:28:30 +0100

Add jump targets so that a bit of exception handling can be better reused
at the end of this function.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 sound/pci/ens1370.c | 29 +++++++++++++++++------------
 1 file changed, 17 insertions(+), 12 deletions(-)

diff --git a/sound/pci/ens1370.c b/sound/pci/ens1370.c
index 55c5173036d3..4b4ca772cafb 100644
--- a/sound/pci/ens1370.c
+++ b/sound/pci/ens1370.c
@@ -2097,8 +2097,8 @@ static int snd_ensoniq_create(struct snd_card *card,
 		return err;
 	ensoniq = kzalloc(sizeof(*ensoniq), GFP_KERNEL);
 	if (ensoniq == NULL) {
-		pci_disable_device(pci);
-		return -ENOMEM;
+		err = -ENOMEM;
+		goto disable_device;
 	}
 	spin_lock_init(&ensoniq->reg_lock);
 	mutex_init(&ensoniq->src_mutex);
@@ -2108,23 +2108,20 @@ static int snd_ensoniq_create(struct snd_card *card,
 	err = pci_request_regions(pci, "Ensoniq AudioPCI");
 	if (err < 0) {
 		kfree(ensoniq);
-		pci_disable_device(pci);
-		return err;
+		goto disable_device;
 	}
 	ensoniq->port = pci_resource_start(pci, 0);
 	if (request_irq(pci->irq, snd_audiopci_interrupt, IRQF_SHARED,
 			KBUILD_MODNAME, ensoniq)) {
 		dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
-		snd_ensoniq_free(ensoniq);
-		return -EBUSY;
+		goto e_busy;
 	}
 	ensoniq->irq = pci->irq;
 #ifdef CHIP1370
 	if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci),
 				16, &ensoniq->dma_bug) < 0) {
 		dev_err(card->dev, "unable to allocate space for phantom area - dma_bug\n");
-		snd_ensoniq_free(ensoniq);
-		return -EBUSY;
+		goto e_busy;
 	}
 #endif
 	pci_set_master(pci);
@@ -2150,15 +2147,23 @@ static int snd_ensoniq_create(struct snd_card *card,
 
 	snd_ensoniq_chip_init(ensoniq);
 	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, ensoniq, &ops);
-	if (err < 0) {
-		snd_ensoniq_free(ensoniq);
-		return err;
-	}
+	if (err < 0)
+		goto free_sound_chip;
 
 	snd_ensoniq_proc_init(ensoniq);
 
 	*rensoniq = ensoniq;
 	return 0;
+
+disable_device:
+	pci_disable_device(pci);
+	return err;
+
+e_busy:
+	err = -EBUSY;
+free_sound_chip:
+	snd_ensoniq_free(ensoniq);
+	return err;
 }
 
 /*
-- 
2.15.0