* [PATCH] ASoC: fsl_asrc_dma: fix error handling for DMA channel retrieval
@ 2026-10-28 2:59 shengjiu.wang
2026-11-06 5:50 ` Chancel Liu
0 siblings, 1 reply; 2+ messages in thread
From: shengjiu.wang @ 2026-10-28 2:59 UTC (permalink / raw)
To: shengjiu.wang, Xiubo.Lee, festevam, nicoleotsuka, lgirdwood,
broonie, perex, tiwai, linux-sound, linuxppc-dev, linux-kernel
From: Shengjiu Wang <shengjiu.wang@nxp.com>
The original check used `if (!tmp_chan)`, which only catches NULL pointers.
However `asrc->get_dma_channel()` returns an error pointer. The NULL check
will always succeed, so replace it with `IS_ERR(tmp_chan)` to correctly
detect errors.
Fixes: b4136c0d69ea ("ASoC: fsl_asrc: check the second front-end DMA channel")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
---
sound/soc/fsl/fsl_asrc_dma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/soc/fsl/fsl_asrc_dma.c b/sound/soc/fsl/fsl_asrc_dma.c
index b417de6abebe..b39d3d76d26a 100644
--- a/sound/soc/fsl/fsl_asrc_dma.c
+++ b/sound/soc/fsl/fsl_asrc_dma.c
@@ -251,7 +251,7 @@ static int fsl_asrc_dma_hw_params(struct snd_soc_component *component,
/* Get DMA request of Front-End */
tmp_chan = asrc->get_dma_channel(pair, dir);
- if (!tmp_chan) {
+ if (IS_ERR(tmp_chan)) {
dma_release_channel(pair->dma_chan[!dir]);
pair->dma_chan[!dir] = NULL;
return -EINVAL;
--
2.34.1
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] ASoC: fsl_asrc_dma: fix error handling for DMA channel retrieval
2026-10-28 2:59 [PATCH] ASoC: fsl_asrc_dma: fix error handling for DMA channel retrieval shengjiu.wang
@ 2026-11-06 5:50 ` Chancel Liu
0 siblings, 0 replies; 2+ messages in thread
From: Chancel Liu @ 2026-11-06 5:50 UTC (permalink / raw)
To: shengjiu.wang, shengjiu.wang, Xiubo.Lee, festevam, nicoleotsuka,
lgirdwood, broonie, perex, tiwai, linux-sound, linuxppc-dev,
linux-kernel
On 10/28/2026 10:59 AM, shengjiu.wang@oss.nxp.com wrote:
> From: Shengjiu Wang <shengjiu.wang@nxp.com>
>
> The original check used `if (!tmp_chan)`, which only catches NULL pointers.
> However `asrc->get_dma_channel()` returns an error pointer. The NULL check
> will always succeed, so replace it with `IS_ERR(tmp_chan)` to correctly
> detect errors.
>
> Fixes: b4136c0d69ea ("ASoC: fsl_asrc: check the second front-end DMA channel")
> Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Chancel Liu <chancel.liu@gmail.com>
Regards,
Chancel Liu
> ---
> sound/soc/fsl/fsl_asrc_dma.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/sound/soc/fsl/fsl_asrc_dma.c b/sound/soc/fsl/fsl_asrc_dma.c
> index b417de6abebe..b39d3d76d26a 100644
> --- a/sound/soc/fsl/fsl_asrc_dma.c
> +++ b/sound/soc/fsl/fsl_asrc_dma.c
> @@ -251,7 +251,7 @@ static int fsl_asrc_dma_hw_params(struct snd_soc_component *component,
>
> /* Get DMA request of Front-End */
> tmp_chan = asrc->get_dma_channel(pair, dir);
> - if (!tmp_chan) {
> + if (IS_ERR(tmp_chan)) {
> dma_release_channel(pair->dma_chan[!dir]);
> pair->dma_chan[!dir] = NULL;
> return -EINVAL;
^ permalink raw reply [flat|nested] 2+ messages in thread
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2026-11-06 5:50 ` Chancel Liu
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