On 2025-09-09 8:19 AM, Venkata Prasad Potturu wrote:
Use dev_get_drvdata(dev->parent) instead of dev_get_platdata(dev)
to correctly get acp_chip_info members in acp I2S driver.
This resolves issues where some members were zero due to incorrect
data access.
Hi,
'some members were zero' meaning null-ptr-deref? If so, please reword to
make it more explicit.
Given the history of this file, mainly Commit 6d9b64156d84 ("ASoC: amd:
acp: Fix NULL pointer deref in acp_i2s_set_tdm_slot") it's kind of
surprising that the issue is addressed in staggered fashion. Why was
set_tdm_slot() fixed separately?
Fixes: e3933683b25e ("ASoC: amd: acp: Remove redundant acp_dev_data structure")
Signed-off-by: Venkata Prasad Potturu <venkataprasad.potturu@xxxxxxx>
No newline between the tags, please.
---
sound/soc/amd/acp/acp-i2s.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/sound/soc/amd/acp/acp-i2s.c b/sound/soc/amd/acp/acp-i2s.c
index 617690362ad7..4ba0a66981ea 100644
--- a/sound/soc/amd/acp/acp-i2s.c
+++ b/sound/soc/amd/acp/acp-i2s.c
@@ -73,7 +73,7 @@ static int acp_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
struct device *dev = cpu_dai->component->dev;
- struct acp_chip_info *chip = dev_get_platdata(dev);
+ struct acp_chip_info *chip = dev_get_drvdata(dev->parent);
int mode;
mode = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
@@ -199,7 +199,7 @@ static int acp_i2s_hwparams(struct snd_pcm_substream *substream, struct snd_pcm_
u32 reg_val, fmt_reg, tdm_fmt;
u32 lrclk_div_val, bclk_div_val;
- chip = dev_get_platdata(dev);
+ chip = dev_get_drvdata(dev->parent);
rsrc = chip->rsrc;
/* These values are as per Hardware Spec */
@@ -386,7 +386,7 @@ static int acp_i2s_trigger(struct snd_pcm_substream *substream, int cmd, struct
{
struct acp_stream *stream = substream->runtime->private_data;
struct device *dev = dai->component->dev;
- struct acp_chip_info *chip = dev_get_platdata(dev);
+ struct acp_chip_info *chip = dev_get_drvdata(dev->parent);
struct acp_resource *rsrc = chip->rsrc;
u32 val, period_bytes, reg_val, ier_val, water_val, buf_size, buf_reg;
@@ -516,14 +516,13 @@ static int acp_i2s_trigger(struct snd_pcm_substream *substream, int cmd, struct
static int acp_i2s_prepare(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
{
struct device *dev = dai->component->dev;
- struct acp_chip_info *chip = dev_get_platdata(dev);
+ struct acp_chip_info *chip = dev_get_drvdata(dev->parent);
struct acp_resource *rsrc = chip->rsrc;
struct acp_stream *stream = substream->runtime->private_data;
u32 reg_dma_size = 0, reg_fifo_size = 0, reg_fifo_addr = 0;
u32 phy_addr = 0, acp_fifo_addr = 0, ext_int_ctrl;
unsigned int dir = substream->stream;
- chip = dev_get_platdata(dev);
switch (dai->driver->id) {
case I2S_SP_INSTANCE:
if (dir == SNDRV_PCM_STREAM_PLAYBACK) {
@@ -632,7 +631,7 @@ static int acp_i2s_startup(struct snd_pcm_substream *substream, struct snd_soc_d
{
struct acp_stream *stream = substream->runtime->private_data;
struct device *dev = dai->component->dev;
- struct acp_chip_info *chip = dev_get_platdata(dev);
+ struct acp_chip_info *chip = dev_get_drvdata(dev->parent);
struct acp_resource *rsrc = chip->rsrc;
unsigned int dir = substream->stream;
unsigned int irq_bit = 0;
