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SubjectRe: [PATCH] ASoC: qcom: Fix for DMA interrupt clear reg overwriting
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Hi Stephen,

Thanks for Your Time for review comments!!!

On 6/3/2021 11:47 AM, Stephen Boyd wrote:
> Quoting Srinivasa Rao Mandadapu (2021-06-02 22:05:30)
>> This patch fixes the DMA interrupt registers overwriting
> $ git grep "This patch" -- Documentation/process
Okay will change description.
>
>> issue in lpass platform interrupt handler.
> Can you describe the issue more?
Sure. will elaborate more.
>
>> Signed-off-by: Srinivasa Rao Mandadapu <srivasam@codeaurora.org>
>> ---
> Any Fixes tag?
>
>> sound/soc/qcom/lpass-platform.c | 17 +++++++++++------
>> 1 file changed, 11 insertions(+), 6 deletions(-)
>>
>> diff --git a/sound/soc/qcom/lpass-platform.c b/sound/soc/qcom/lpass-platform.c
>> index 0df9481ea4c6..e02caa121fa4 100644
>> --- a/sound/soc/qcom/lpass-platform.c
>> +++ b/sound/soc/qcom/lpass-platform.c
>> @@ -650,7 +650,7 @@ static irqreturn_t lpass_dma_interrupt_handler(
>> struct lpass_variant *v = drvdata->variant;
>> irqreturn_t ret = IRQ_NONE;
>> int rv;
>> - unsigned int reg = 0, val = 0;
>> + unsigned int reg = 0, val = 0, val_clr = 0, val_mask = 0;
> Why assign to 0 and then overwrite it?
Okay. Will remove initialization.
>
>> struct regmap *map;
>> unsigned int dai_id = cpu_dai->driver->id;
>>
>> @@ -676,8 +676,9 @@ static irqreturn_t lpass_dma_interrupt_handler(
>> return -EINVAL;
>> }
>> if (interrupts & LPAIF_IRQ_PER(chan)) {
>> -
>> - rv = regmap_write(map, reg, LPAIF_IRQ_PER(chan) | val);
>> + val_clr = (LPAIF_IRQ_PER(chan) | val);
> Is the extra parenthesis useful?
Not exactly. Will remove it.
>
>> + val_mask = LPAIF_IRQ_ALL(chan);
>> + rv = regmap_update_bits(map, reg, val_mask, val_clr);
>> if (rv) {
>> dev_err(soc_runtime->dev,
>> "error writing to irqclear reg: %d\n", rv);

--
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.,
is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.

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