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Date: Mon, 13 Nov 2017 09:56:51 +0100
From: SF Markus Elfring <elfring@...rs.sourceforge.net>
To: alsa-devel@...a-project.org, Bhumika Goyal <bhumirks@...il.com>,
Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc: LKML <linux-kernel@...r.kernel.org>,
kernel-janitors@...r.kernel.org
Subject: [PATCH] ALSA: aw2: Use common error handling code in three functions
From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Mon, 13 Nov 2017 09:49:15 +0100
Add jump targets so that a bit of exception handling can be better reused
at the end of these functions.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
sound/pci/aw2/aw2-alsa.c | 85 +++++++++++++++++++++++-------------------------
1 file changed, 40 insertions(+), 45 deletions(-)
diff --git a/sound/pci/aw2/aw2-alsa.c b/sound/pci/aw2/aw2-alsa.c
index 9a49e4243a9c..25710043c79d 100644
--- a/sound/pci/aw2/aw2-alsa.c
+++ b/sound/pci/aw2/aw2-alsa.c
@@ -261,13 +261,13 @@ static int snd_aw2_create(struct snd_card *card,
if ((dma_set_mask(&pci->dev, DMA_BIT_MASK(32)) < 0) ||
(dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(32)) < 0)) {
dev_err(card->dev, "Impossible to set 32bit mask DMA\n");
- pci_disable_device(pci);
- return -ENXIO;
+ err = -ENXIO;
+ goto disable_device;
}
chip = kzalloc(sizeof(*chip), GFP_KERNEL);
if (chip == NULL) {
- pci_disable_device(pci);
- return -ENOMEM;
+ err = -ENOMEM;
+ goto disable_device;
}
/* initialize the stuff */
@@ -277,11 +277,9 @@ static int snd_aw2_create(struct snd_card *card,
/* (1) PCI resource allocation */
err = pci_request_regions(pci, "Audiowerk2");
- if (err < 0) {
- pci_disable_device(pci);
- kfree(chip);
- return err;
- }
+ if (err < 0)
+ goto free_data;
+
chip->iobase_phys = pci_resource_start(pci, 0);
chip->iobase_virt =
ioremap_nocache(chip->iobase_phys,
@@ -289,10 +287,8 @@ static int snd_aw2_create(struct snd_card *card,
if (chip->iobase_virt == NULL) {
dev_err(card->dev, "unable to remap memory region");
- pci_release_regions(pci);
- pci_disable_device(pci);
- kfree(chip);
- return -ENOMEM;
+ err = -ENOMEM;
+ goto release_regions;
}
/* (2) initialization of the chip hardware */
@@ -301,23 +297,15 @@ static int snd_aw2_create(struct snd_card *card,
if (request_irq(pci->irq, snd_aw2_saa7146_interrupt,
IRQF_SHARED, KBUILD_MODNAME, chip)) {
dev_err(card->dev, "Cannot grab irq %d\n", pci->irq);
-
- iounmap(chip->iobase_virt);
- pci_release_regions(chip->pci);
- pci_disable_device(chip->pci);
- kfree(chip);
- return -EBUSY;
+ err = -EBUSY;
+ goto unmap_io;
}
chip->irq = pci->irq;
err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
if (err < 0) {
free_irq(chip->irq, (void *)chip);
- iounmap(chip->iobase_virt);
- pci_release_regions(chip->pci);
- pci_disable_device(chip->pci);
- kfree(chip);
- return err;
+ goto unmap_io;
}
*rchip = chip;
@@ -325,6 +313,16 @@ static int snd_aw2_create(struct snd_card *card,
dev_info(card->dev,
"Audiowerk 2 sound card (saa7146 chipset) detected and managed\n");
return 0;
+
+unmap_io:
+ iounmap(chip->iobase_virt);
+release_regions:
+ pci_release_regions(pci);
+free_data:
+ kfree(chip);
+disable_device:
+ pci_disable_device(pci);
+ return err;
}
/* constructor */
@@ -352,10 +350,8 @@ static int snd_aw2_probe(struct pci_dev *pci,
/* (3) Create main component */
err = snd_aw2_create(card, pci, &chip);
- if (err < 0) {
- snd_card_free(card);
- return err;
- }
+ if (err < 0)
+ goto free_card;
/* initialize mutex */
mutex_init(&chip->mtx);
@@ -373,16 +369,18 @@ static int snd_aw2_probe(struct pci_dev *pci,
/* (6) Register card instance */
err = snd_card_register(card);
- if (err < 0) {
- snd_card_free(card);
- return err;
- }
+ if (err < 0)
+ goto free_card;
/* (7) Set PCI driver data */
pci_set_drvdata(pci, card);
dev++;
return 0;
+
+free_card:
+ snd_card_free(card);
+ return err;
}
/* destructor */
@@ -599,10 +597,8 @@ static int snd_aw2_new_pcm(struct aw2 *chip)
err = snd_pcm_new(chip->card, "Audiowerk2 analog playback", 0, 1, 0,
&pcm_playback_ana);
- if (err < 0) {
- dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
- return err;
- }
+ if (err < 0)
+ goto report_failure;
/* Creation ok */
pcm_device = &chip->device_playback[NUM_STREAM_PLAYBACK_ANA];
@@ -636,11 +632,9 @@ static int snd_aw2_new_pcm(struct aw2 *chip)
err = snd_pcm_new(chip->card, "Audiowerk2 digital playback", 1, 1, 0,
&pcm_playback_num);
+ if (err < 0)
+ goto report_failure;
- if (err < 0) {
- dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
- return err;
- }
/* Creation ok */
pcm_device = &chip->device_playback[NUM_STREAM_PLAYBACK_DIG];
@@ -673,11 +667,8 @@ static int snd_aw2_new_pcm(struct aw2 *chip)
err = snd_pcm_new(chip->card, "Audiowerk2 capture", 2, 0, 1,
&pcm_capture);
-
- if (err < 0) {
- dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
- return err;
- }
+ if (err < 0)
+ goto report_failure;
/* Creation ok */
pcm_device = &chip->device_capture[NUM_STREAM_CAPTURE_ANA];
@@ -718,6 +709,10 @@ static int snd_aw2_new_pcm(struct aw2 *chip)
}
return 0;
+
+report_failure:
+ dev_err(chip->card->dev, "snd_pcm_new error (0x%X)\n", err);
+ return err;
}
static int snd_aw2_control_switch_capture_info(struct snd_kcontrol *kcontrol,
--
2.15.0
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