[alsa-devel] [PATCH 1/3] ALSA: vx222: Use container_of()
Takashi Iwai
tiwai at suse.de
Mon May 15 11:29:03 CEST 2017
The vx222 driver is using the explicit cast from the parent class
pointer, but it'll be broken when the structure field randomization is
applied. Use container_of() in a modern manner, instead.
Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
sound/pci/vx222/vx222.c | 4 ++--
sound/pci/vx222/vx222.h | 2 ++
sound/pci/vx222/vx222_ops.c | 26 +++++++++++++-------------
3 files changed, 17 insertions(+), 15 deletions(-)
diff --git a/sound/pci/vx222/vx222.c b/sound/pci/vx222/vx222.c
index ecbaf473fc1e..55861849d7df 100644
--- a/sound/pci/vx222/vx222.c
+++ b/sound/pci/vx222/vx222.c
@@ -116,7 +116,7 @@ static struct snd_vx_hardware vx222_mic_hw = {
*/
static int snd_vx222_free(struct vx_core *chip)
{
- struct snd_vx222 *vx = (struct snd_vx222 *)chip;
+ struct snd_vx222 *vx = to_vx222(chip);
if (chip->irq >= 0)
free_irq(chip->irq, (void*)chip);
@@ -158,7 +158,7 @@ static int snd_vx222_create(struct snd_card *card, struct pci_dev *pci,
pci_disable_device(pci);
return -ENOMEM;
}
- vx = (struct snd_vx222 *)chip;
+ vx = to_vx222(chip);
vx->pci = pci;
if ((err = pci_request_regions(pci, CARD_NAME)) < 0) {
diff --git a/sound/pci/vx222/vx222.h b/sound/pci/vx222/vx222.h
index 2f0d78f609a6..cae355c8ed28 100644
--- a/sound/pci/vx222/vx222.h
+++ b/sound/pci/vx222/vx222.h
@@ -39,6 +39,8 @@ struct snd_vx222 {
int mic_level; /* mic level for vx222 mic */
};
+#define to_vx222(x) container_of(x, struct snd_vx222, core)
+
/* we use a lookup table with 148 values, see vx_mixer.c */
#define VX2_AKM_LEVEL_MAX 0x93
diff --git a/sound/pci/vx222/vx222_ops.c b/sound/pci/vx222/vx222_ops.c
index 7df1663ea510..d4298af6d3ee 100644
--- a/sound/pci/vx222/vx222_ops.c
+++ b/sound/pci/vx222/vx222_ops.c
@@ -86,7 +86,7 @@ static int vx2_reg_index[VX_REG_MAX] = {
static inline unsigned long vx2_reg_addr(struct vx_core *_chip, int reg)
{
- struct snd_vx222 *chip = (struct snd_vx222 *)_chip;
+ struct snd_vx222 *chip = to_vx222(_chip);
return chip->port[vx2_reg_index[reg]] + vx2_reg_offset[reg];
}
@@ -159,7 +159,7 @@ static void vx2_outl(struct vx_core *chip, int offset, unsigned int val)
static void vx2_reset_dsp(struct vx_core *_chip)
{
- struct snd_vx222 *chip = (struct snd_vx222 *)_chip;
+ struct snd_vx222 *chip = to_vx222(_chip);
/* set the reset dsp bit to 0 */
vx_outl(chip, CDSP, chip->regCDSP & ~VX_CDSP_DSP_RESET_MASK);
@@ -174,7 +174,7 @@ static void vx2_reset_dsp(struct vx_core *_chip)
static int vx2_test_xilinx(struct vx_core *_chip)
{
- struct snd_vx222 *chip = (struct snd_vx222 *)_chip;
+ struct snd_vx222 *chip = to_vx222(_chip);
unsigned int data;
dev_dbg(_chip->card->dev, "testing xilinx...\n");
@@ -479,7 +479,7 @@ static int vx2_test_and_ack(struct vx_core *chip)
*/
static void vx2_validate_irq(struct vx_core *_chip, int enable)
{
- struct snd_vx222 *chip = (struct snd_vx222 *)_chip;
+ struct snd_vx222 *chip = to_vx222(_chip);
/* Set the interrupt enable bit to 1 in CDSP register */
if (enable) {
@@ -730,7 +730,7 @@ static void vx2_old_write_codec_bit(struct vx_core *chip, int codec, unsigned in
*/
static void vx2_reset_codec(struct vx_core *_chip)
{
- struct snd_vx222 *chip = (struct snd_vx222 *)_chip;
+ struct snd_vx222 *chip = to_vx222(_chip);
/* Set the reset CODEC bit to 0. */
vx_outl(chip, CDSP, chip->regCDSP &~ VX_CDSP_CODEC_RESET_MASK);
@@ -772,7 +772,7 @@ static void vx2_reset_codec(struct vx_core *_chip)
*/
static void vx2_change_audio_source(struct vx_core *_chip, int src)
{
- struct snd_vx222 *chip = (struct snd_vx222 *)_chip;
+ struct snd_vx222 *chip = to_vx222(_chip);
switch (src) {
case VX_AUDIO_SRC_DIGITAL:
@@ -791,7 +791,7 @@ static void vx2_change_audio_source(struct vx_core *_chip, int src)
*/
static void vx2_set_clock_source(struct vx_core *_chip, int source)
{
- struct snd_vx222 *chip = (struct snd_vx222 *)_chip;
+ struct snd_vx222 *chip = to_vx222(_chip);
if (source == INTERNAL_QUARTZ)
chip->regCFG &= ~VX_CFG_CLOCKIN_SEL_MASK;
@@ -805,7 +805,7 @@ static void vx2_set_clock_source(struct vx_core *_chip, int source)
*/
static void vx2_reset_board(struct vx_core *_chip, int cold_reset)
{
- struct snd_vx222 *chip = (struct snd_vx222 *)_chip;
+ struct snd_vx222 *chip = to_vx222(_chip);
/* initialize the register values */
chip->regCDSP = VX_CDSP_CODEC_RESET_MASK | VX_CDSP_DSP_RESET_MASK ;
@@ -878,7 +878,7 @@ static int vx_input_level_info(struct snd_kcontrol *kcontrol, struct snd_ctl_ele
static int vx_input_level_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
struct vx_core *_chip = snd_kcontrol_chip(kcontrol);
- struct snd_vx222 *chip = (struct snd_vx222 *)_chip;
+ struct snd_vx222 *chip = to_vx222(_chip);
mutex_lock(&_chip->mixer_mutex);
ucontrol->value.integer.value[0] = chip->input_level[0];
ucontrol->value.integer.value[1] = chip->input_level[1];
@@ -889,7 +889,7 @@ static int vx_input_level_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem
static int vx_input_level_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
struct vx_core *_chip = snd_kcontrol_chip(kcontrol);
- struct snd_vx222 *chip = (struct snd_vx222 *)_chip;
+ struct snd_vx222 *chip = to_vx222(_chip);
if (ucontrol->value.integer.value[0] < 0 ||
ucontrol->value.integer.value[0] > MIC_LEVEL_MAX)
return -EINVAL;
@@ -922,7 +922,7 @@ static int vx_mic_level_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_
static int vx_mic_level_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
struct vx_core *_chip = snd_kcontrol_chip(kcontrol);
- struct snd_vx222 *chip = (struct snd_vx222 *)_chip;
+ struct snd_vx222 *chip = to_vx222(_chip);
ucontrol->value.integer.value[0] = chip->mic_level;
return 0;
}
@@ -930,7 +930,7 @@ static int vx_mic_level_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_v
static int vx_mic_level_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
struct vx_core *_chip = snd_kcontrol_chip(kcontrol);
- struct snd_vx222 *chip = (struct snd_vx222 *)_chip;
+ struct snd_vx222 *chip = to_vx222(_chip);
if (ucontrol->value.integer.value[0] < 0 ||
ucontrol->value.integer.value[0] > MIC_LEVEL_MAX)
return -EINVAL;
@@ -973,7 +973,7 @@ static const struct snd_kcontrol_new vx_control_mic_level = {
static int vx2_add_mic_controls(struct vx_core *_chip)
{
- struct snd_vx222 *chip = (struct snd_vx222 *)_chip;
+ struct snd_vx222 *chip = to_vx222(_chip);
int err;
if (_chip->type != VX_TYPE_MIC)
--
2.12.2
More information about the Alsa-devel
mailing list