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Subject[PATCH 1/4] ALSA: riptide: Adjust 13 function calls together with a variable assignment
From
Date
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Fri, 17 Nov 2017 09:43:55 +0100

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

ERROR: do not use assignment in if condition

Thus fix affected source code places.

* Replace the specification of two data structures by pointer dereferences
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
sound/pci/riptide/riptide.c | 53 ++++++++++++++++++++++++++++-----------------
1 file changed, 33 insertions(+), 20 deletions(-)

diff --git a/sound/pci/riptide/riptide.c b/sound/pci/riptide/riptide.c
index 44f3b48d47b1..22d15ea7e210 100644
--- a/sound/pci/riptide/riptide.c
+++ b/sound/pci/riptide/riptide.c
@@ -1564,10 +1564,12 @@ snd_riptide_hw_params(struct snd_pcm_substream *substream,
(int)sgdlist->bytes);
if (sgdlist->area)
snd_dma_free_pages(sgdlist);
- if ((err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
- snd_dma_pci_data(chip->pci),
- sizeof(struct sgd) * (DESC_MAX_MASK + 1),
- sgdlist)) < 0) {
+
+ err = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
+ snd_dma_pci_data(chip->pci),
+ sizeof(struct sgd) * (DESC_MAX_MASK + 1),
+ sgdlist);
+ if (err < 0) {
snd_printk(KERN_ERR "Riptide: failed to alloc %d dma bytes\n",
(int)sizeof(struct sgd) * (DESC_MAX_MASK + 1));
return err;
@@ -1695,11 +1697,10 @@ static const struct snd_pcm_ops snd_riptide_capture_ops = {
static int snd_riptide_pcm(struct snd_riptide *chip, int device)
{
struct snd_pcm *pcm;
- int err;
+ int err = snd_pcm_new(chip->card, "RIPTIDE", device,
+ PLAYBACK_SUBSTREAMS, 1, &pcm);

- if ((err =
- snd_pcm_new(chip->card, "RIPTIDE", device, PLAYBACK_SUBSTREAMS, 1,
- &pcm)) < 0)
+ if (err < 0)
return err;
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
&snd_riptide_playback_ops);
@@ -1786,14 +1787,16 @@ static int snd_riptide_initialize(struct snd_riptide *chip)

cif = chip->cif;
if (!cif) {
- if ((cif = kzalloc(sizeof(struct cmdif), GFP_KERNEL)) == NULL)
+ cif = kzalloc(sizeof(*cif), GFP_KERNEL);
+ if (!cif)
return -ENOMEM;
cif->hwport = (struct riptideport *)chip->port;
spin_lock_init(&cif->lock);
chip->cif = cif;
}
cif->is_reset = 0;
- if ((err = riptide_reset(cif, chip)) != 0)
+ err = riptide_reset(cif, chip);
+ if (err)
return err;
device_id = chip->device_id;
switch (device_id) {
@@ -1817,7 +1820,8 @@ static int snd_riptide_free(struct snd_riptide *chip)
if (!chip)
return 0;

- if ((cif = chip->cif)) {
+ cif = chip->cif;
+ if (cif) {
SET_GRESET(cif->hwport);
udelay(100);
UNSET_GRESET(cif->hwport);
@@ -1850,9 +1854,12 @@ snd_riptide_create(struct snd_card *card, struct pci_dev *pci,
};

*rchip = NULL;
- if ((err = pci_enable_device(pci)) < 0)
+ err = pci_enable_device(pci);
+ if (err < 0)
return err;
- if (!(chip = kzalloc(sizeof(struct snd_riptide), GFP_KERNEL)))
+
+ chip = kzalloc(sizeof(*chip), GFP_KERNEL);
+ if (!chip)
return -ENOMEM;

spin_lock_init(&chip->lock);
@@ -1866,8 +1873,8 @@ snd_riptide_create(struct snd_card *card, struct pci_dev *pci,
chip->cif = NULL;
tasklet_init(&chip->riptide_tq, riptide_handleirq, (unsigned long)chip);

- if ((chip->res_port =
- request_region(chip->port, 64, "RIPTIDE")) == NULL) {
+ chip->res_port = request_region(chip->port, 64, "RIPTIDE");
+ if (!chip->res_port) {
snd_printk(KERN_ERR
"Riptide: unable to grab region 0x%lx-0x%lx\n",
chip->port, chip->port + 64 - 1);
@@ -1887,12 +1894,14 @@ snd_riptide_create(struct snd_card *card, struct pci_dev *pci,
chip->irq = pci->irq;
chip->device_id = pci->device;
pci_set_master(pci);
- if ((err = snd_riptide_initialize(chip)) < 0) {
+ err = snd_riptide_initialize(chip);
+ if (err < 0) {
snd_riptide_free(chip);
return err;
}

- 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) {
snd_riptide_free(chip);
return err;
}
@@ -1922,7 +1931,9 @@ snd_riptide_proc_read(struct snd_info_entry *entry,
for (i = 0; i < 64; i += 4)
snd_iprintf(buffer, "%c%02x: %08x",
(i % 16) ? ' ' : '\n', i, inl(chip->port + i));
- if ((cif = chip->cif)) {
+
+ cif = chip->cif;
+ if (cif) {
snd_iprintf(buffer,
"\nVersion: ASIC: %d CODEC: %d AUXDSP: %d PROG: %d",
chip->firmware.firmware.ASIC,
@@ -1994,12 +2005,14 @@ static int snd_riptide_mixer(struct snd_riptide *chip)
ac97.private_data = chip;
ac97.scaps = AC97_SCAP_SKIP_MODEM;

- if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 0)
+ err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus);
+ if (err < 0)
return err;

chip->ac97_bus = pbus;
ac97.pci = chip->pci;
- if ((err = snd_ac97_mixer(pbus, &ac97, &chip->ac97)) < 0)
+ err = snd_ac97_mixer(pbus, &ac97, &chip->ac97);
+ if (err < 0)
return err;
return err;
}
--
2.15.0
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