[PATCH 0/3] ALSA-S3 SonicVibes: Fine-tuning for five function implementations

[PATCH 0/3] ALSA-S3 SonicVibes: Fine-tuning for five function implementations

[SF Markus Elfring]

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 18 Nov 2017 16:25:43 +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_sonic_probe()
  Use common error handling code in snd_sonicvibes_create()

 sound/pci/sonicvibes.c | 144 +++++++++++++++++++++++++++----------------------
 1 file changed, 79 insertions(+), 65 deletions(-)

-- 
2.15.0

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

[SF Markus Elfring]

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 18 Nov 2017 16:08:23 +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/sonicvibes.c | 70 +++++++++++++++++++++++++++++++-------------------
 1 file changed, 43 insertions(+), 27 deletions(-)

diff --git a/sound/pci/sonicvibes.c b/sound/pci/sonicvibes.c
index a8abb15e3c3a..7c238d908031 100644
--- a/sound/pci/sonicvibes.c
+++ b/sound/pci/sonicvibes.c
@@ -882,9 +882,9 @@ static const struct snd_pcm_ops snd_sonicvibes_capture_ops = {
 static int snd_sonicvibes_pcm(struct sonicvibes *sonic, int device)
 {
 	struct snd_pcm *pcm;
-	int err;
+	int err = snd_pcm_new(sonic->card, "s3_86c617", device, 1, 1, &pcm);
 
-	if ((err = snd_pcm_new(sonic->card, "s3_86c617", device, 1, 1, &pcm)) < 0)
+	if (err < 0)
 		return err;
 	if (snd_BUG_ON(!pcm))
 		return -EINVAL;
@@ -1125,7 +1125,9 @@ static int snd_sonicvibes_mixer(struct sonicvibes *sonic)
 	strcpy(card->mixername, "S3 SonicVibes");
 
 	for (idx = 0; idx < ARRAY_SIZE(snd_sonicvibes_controls); idx++) {
-		if ((err = snd_ctl_add(card, kctl = snd_ctl_new1(&snd_sonicvibes_controls[idx], sonic))) < 0)
+		kctl = snd_ctl_new1(&snd_sonicvibes_controls[idx], sonic);
+		err = snd_ctl_add(card, kctl);
+		if (err < 0)
 			return err;
 		switch (idx) {
 		case 0:
@@ -1256,7 +1258,8 @@ static int snd_sonicvibes_create(struct snd_card *card,
 
 	*rsonic = NULL;
 	/* enable PCI device */
-	if ((err = pci_enable_device(pci)) < 0)
+	err = pci_enable_device(pci);
+	if (err < 0)
 		return err;
 	/* check, if we can restrict PCI DMA transfers to 24 bits */
 	if (dma_set_mask(&pci->dev, DMA_BIT_MASK(24)) < 0 ||
@@ -1277,7 +1280,8 @@ static int snd_sonicvibes_create(struct snd_card *card,
 	sonic->pci = pci;
 	sonic->irq = -1;
 
-	if ((err = pci_request_regions(pci, "S3 SonicVibes")) < 0) {
+	err = pci_request_regions(pci, "S3 SonicVibes");
+	if (err < 0) {
 		kfree(sonic);
 		pci_disable_device(pci);
 		return err;
@@ -1319,14 +1323,17 @@ static int snd_sonicvibes_create(struct snd_card *card,
 	pci_write_config_dword(pci, 0x40, dmaa);
 	pci_write_config_dword(pci, 0x48, dmac);
 
-	if ((sonic->res_dmaa = request_region(dmaa, 0x10, "S3 SonicVibes DDMA-A")) == NULL) {
+	sonic->res_dmaa = request_region(dmaa, 0x10, "S3 SonicVibes DDMA-A");
+	if (!sonic->res_dmaa) {
 		snd_sonicvibes_free(sonic);
 		dev_err(card->dev,
 			"unable to grab DDMA-A port at 0x%x-0x%x\n",
 			dmaa, dmaa + 0x10 - 1);
 		return -EBUSY;
 	}
-	if ((sonic->res_dmac = request_region(dmac, 0x10, "S3 SonicVibes DDMA-C")) == NULL) {
+
+	sonic->res_dmac = request_region(dmac, 0x10, "S3 SonicVibes DDMA-C");
+	if (!sonic->res_dmac) {
 		snd_sonicvibes_free(sonic);
 		dev_err(card->dev,
 			"unable to grab DDMA-C port at 0x%x-0x%x\n",
@@ -1387,8 +1394,8 @@ static int snd_sonicvibes_create(struct snd_card *card,
 	snd_sonicvibes_debug(sonic);
 #endif
 	sonic->revision = snd_sonicvibes_in(sonic, SV_IREG_REVISION);
-
-	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, sonic, &ops)) < 0) {
+	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, sonic, &ops);
+	if (err < 0) {
 		snd_sonicvibes_free(sonic);
 		return err;
 	}
@@ -1437,9 +1444,13 @@ static int snd_sonicvibes_midi(struct sonicvibes *sonic,
 	mpu->open_input = snd_sonicvibes_midi_input_open;
 	mpu->close_input = snd_sonicvibes_midi_input_close;
 	dir = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
-	for (idx = 0; idx < ARRAY_SIZE(snd_sonicvibes_midi_controls); idx++)
-		if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_sonicvibes_midi_controls[idx], sonic))) < 0)
+	for (idx = 0; idx < ARRAY_SIZE(snd_sonicvibes_midi_controls); idx++) {
+		err = snd_ctl_add(card,
+				  snd_ctl_new1(&snd_sonicvibes_midi_controls[idx],
+					       sonic));
+		if (err < 0)
 			return err;
+	}
 	return 0;
 }
 
@@ -1471,10 +1482,10 @@ static int snd_sonic_probe(struct pci_dev *pci,
 			return -ENODEV;
 		}
 	}
-	if ((err = snd_sonicvibes_create(card, pci,
-					 reverb[dev] ? 1 : 0,
-					 mge[dev] ? 1 : 0,
-					 &sonic)) < 0) {
+
+	err = snd_sonicvibes_create(card, pci, reverb[dev] ? 1 : 0,
+				    mge[dev] ? 1 : 0, &sonic);
+	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}
@@ -1487,37 +1498,42 @@ static int snd_sonic_probe(struct pci_dev *pci,
 		(unsigned long long)pci_resource_start(pci, 1),
 		sonic->irq);
 
-	if ((err = snd_sonicvibes_pcm(sonic, 0)) < 0) {
+	err = snd_sonicvibes_pcm(sonic, 0);
+	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}
-	if ((err = snd_sonicvibes_mixer(sonic)) < 0) {
+	err = snd_sonicvibes_mixer(sonic);
+	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}
-	if ((err = snd_mpu401_uart_new(card, 0, MPU401_HW_SONICVIBES,
-				       sonic->midi_port,
-				       MPU401_INFO_INTEGRATED |
-				       MPU401_INFO_IRQ_HOOK,
-				       -1, &midi_uart)) < 0) {
+	err = snd_mpu401_uart_new(card, 0, MPU401_HW_SONICVIBES,
+				  sonic->midi_port,
+				  MPU401_INFO_INTEGRATED | MPU401_INFO_IRQ_HOOK,
+				  -1, &midi_uart);
+	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}
 	snd_sonicvibes_midi(sonic, midi_uart);
-	if ((err = snd_opl3_create(card, sonic->synth_port,
-				   sonic->synth_port + 2,
-				   OPL3_HW_OPL3_SV, 1, &opl3)) < 0) {
+	err = snd_opl3_create(card, sonic->synth_port,
+			      sonic->synth_port + 2,
+			      OPL3_HW_OPL3_SV, 1, &opl3);
+	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}
-	if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
+	err = snd_opl3_hwdep_new(opl3, 0, 1, NULL);
+	if (err < 0) {
 		snd_card_free(card);
 		return err;
 	}
 
 	snd_sonicvibes_create_gameport(sonic);
 
-	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: sonicvibes: Use common error handling code in snd_sonic_probe()

[SF Markus Elfring]

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 18 Nov 2017 16:10:34 +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/sonicvibes.c | 54 ++++++++++++++++++++++----------------------------
 1 file changed, 24 insertions(+), 30 deletions(-)

diff --git a/sound/pci/sonicvibes.c b/sound/pci/sonicvibes.c
index 7c238d908031..75fc64839df0 100644
--- a/sound/pci/sonicvibes.c
+++ b/sound/pci/sonicvibes.c
@@ -1478,17 +1478,15 @@ static int snd_sonic_probe(struct pci_dev *pci,
 	for (idx = 0; idx < 5; idx++) {
 		if (pci_resource_start(pci, idx) == 0 ||
 		    !(pci_resource_flags(pci, idx) & IORESOURCE_IO)) {
-			snd_card_free(card);
-			return -ENODEV;
+			err = -ENODEV;
+			goto free_card;
 		}
 	}
 
 	err = snd_sonicvibes_create(card, pci, reverb[dev] ? 1 : 0,
 				    mge[dev] ? 1 : 0, &sonic);
-	if (err < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if (err < 0)
+		goto free_card;
 
 	strcpy(card->driver, "SonicVibes");
 	strcpy(card->shortname, "S3 SonicVibes");
@@ -1499,48 +1497,44 @@ static int snd_sonic_probe(struct pci_dev *pci,
 		sonic->irq);
 
 	err = snd_sonicvibes_pcm(sonic, 0);
-	if (err < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if (err < 0)
+		goto free_card;
+
 	err = snd_sonicvibes_mixer(sonic);
-	if (err < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if (err < 0)
+		goto free_card;
+
 	err = snd_mpu401_uart_new(card, 0, MPU401_HW_SONICVIBES,
 				  sonic->midi_port,
 				  MPU401_INFO_INTEGRATED | MPU401_INFO_IRQ_HOOK,
 				  -1, &midi_uart);
-	if (err < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if (err < 0)
+		goto free_card;
+
 	snd_sonicvibes_midi(sonic, midi_uart);
 	err = snd_opl3_create(card, sonic->synth_port,
 			      sonic->synth_port + 2,
 			      OPL3_HW_OPL3_SV, 1, &opl3);
-	if (err < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if (err < 0)
+		goto free_card;
+
 	err = snd_opl3_hwdep_new(opl3, 0, 1, NULL);
-	if (err < 0) {
-		snd_card_free(card);
-		return err;
-	}
+	if (err < 0)
+		goto free_card;
 
 	snd_sonicvibes_create_gameport(sonic);
 
 	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_sonic_remove(struct pci_dev *pci)
-- 
2.15.0

[PATCH 3/3] ALSA: sonicvibes: Use common error handling code in snd_sonicvibes_create()

[SF Markus Elfring]

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 18 Nov 2017 16:12:12 +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/sonicvibes.c | 36 ++++++++++++++++++++----------------
 1 file changed, 20 insertions(+), 16 deletions(-)

diff --git a/sound/pci/sonicvibes.c b/sound/pci/sonicvibes.c
index 75fc64839df0..c2147484c95d 100644
--- a/sound/pci/sonicvibes.c
+++ b/sound/pci/sonicvibes.c
@@ -1266,14 +1266,14 @@ static int snd_sonicvibes_create(struct snd_card *card,
 	    dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(24)) < 0) {
 		dev_err(card->dev,
 			"architecture does not support 24bit PCI busmaster DMA\n");
-		pci_disable_device(pci);
-                return -ENXIO;
+		err = -ENXIO;
+		goto disable_device;
         }
 
 	sonic = kzalloc(sizeof(*sonic), GFP_KERNEL);
 	if (sonic == NULL) {
-		pci_disable_device(pci);
-		return -ENOMEM;
+		err = -ENOMEM;
+		goto disable_device;
 	}
 	spin_lock_init(&sonic->reg_lock);
 	sonic->card = card;
@@ -1283,8 +1283,7 @@ static int snd_sonicvibes_create(struct snd_card *card,
 	err = pci_request_regions(pci, "S3 SonicVibes");
 	if (err < 0) {
 		kfree(sonic);
-		pci_disable_device(pci);
-		return err;
+		goto disable_device;
 	}
 
 	sonic->sb_port = pci_resource_start(pci, 0);
@@ -1296,8 +1295,7 @@ static int snd_sonicvibes_create(struct snd_card *card,
 	if (request_irq(pci->irq, snd_sonicvibes_interrupt, IRQF_SHARED,
 			KBUILD_MODNAME, sonic)) {
 		dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
-		snd_sonicvibes_free(sonic);
-		return -EBUSY;
+		goto e_busy;
 	}
 	sonic->irq = pci->irq;
 
@@ -1325,20 +1323,18 @@ static int snd_sonicvibes_create(struct snd_card *card,
 
 	sonic->res_dmaa = request_region(dmaa, 0x10, "S3 SonicVibes DDMA-A");
 	if (!sonic->res_dmaa) {
-		snd_sonicvibes_free(sonic);
 		dev_err(card->dev,
 			"unable to grab DDMA-A port at 0x%x-0x%x\n",
 			dmaa, dmaa + 0x10 - 1);
-		return -EBUSY;
+		goto e_busy;
 	}
 
 	sonic->res_dmac = request_region(dmac, 0x10, "S3 SonicVibes DDMA-C");
 	if (!sonic->res_dmac) {
-		snd_sonicvibes_free(sonic);
 		dev_err(card->dev,
 			"unable to grab DDMA-C port at 0x%x-0x%x\n",
 			dmac, dmac + 0x10 - 1);
-		return -EBUSY;
+		goto e_busy;
 	}
 
 	pci_read_config_dword(pci, 0x40, &sonic->dmaa_port);
@@ -1395,15 +1391,23 @@ static int snd_sonicvibes_create(struct snd_card *card,
 #endif
 	sonic->revision = snd_sonicvibes_in(sonic, SV_IREG_REVISION);
 	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, sonic, &ops);
-	if (err < 0) {
-		snd_sonicvibes_free(sonic);
-		return err;
-	}
+	if (err < 0)
+		goto free_sound_chip;
 
 	snd_sonicvibes_proc_init(sonic);
 
 	*rsonic = sonic;
 	return 0;
+
+disable_device:
+	pci_disable_device(pci);
+	return err;
+
+e_busy:
+	err = -EBUSY;
+free_sound_chip:
+	snd_sonicvibes_free(sonic);
+	return err;
 }
 
 /*
-- 
2.15.0