Re: [PATCH v3 3/3] spi: geni-qcom: Use devm functions to simplify code

[Jinjie Ruan]

On 2024/9/9 19:51, Dmitry Baryshkov wrote:
> On Mon, 9 Sept 2024 at 14:46, Jinjie Ruan <ruanjinjie@xxxxxxxxxx> wrote:
>>
>>
>>
>> On 2024/9/9 17:49, Dmitry Baryshkov wrote:
>>> On Mon, Sep 09, 2024 at 03:31:41PM GMT, Jinjie Ruan wrote:
>>>> Use devm_pm_runtime_enable(), devm_request_irq() and
>>>> devm_spi_register_controller() to simplify code.
>>>>
>>>> And also register a callback spi_geni_release_dma_chan() with
>>>> devm_add_action_or_reset(), to release dma channel in both error
>>>> and device detach path, which can make sure the release sequence is
>>>> consistent with the original one.
>>>>
>>>> 1. Unregister spi controller.
>>>> 2. Free the IRQ.
>>>> 3. Free DMA chans
>>>> 4. Disable runtime PM.
>>>>
>>>> So the remove function can also be removed.
>>>>
>>>> Suggested-by: Doug Anderson <dianders@xxxxxxxxxxxx>
>>>> Signed-off-by: Jinjie Ruan <ruanjinjie@xxxxxxxxxx>
>>>> ---
>>>> v3:
>>>> - Land the rest of the cleanups afterwards.
>>>> ---
>>>>  drivers/spi/spi-geni-qcom.c | 37 +++++++++++++------------------------
>>>>  1 file changed, 13 insertions(+), 24 deletions(-)
>>>>
>>>> diff --git a/drivers/spi/spi-geni-qcom.c b/drivers/spi/spi-geni-qcom.c
>>>> index 6f4057330444..8b0039d14605 100644
>>>> --- a/drivers/spi/spi-geni-qcom.c
>>>> +++ b/drivers/spi/spi-geni-qcom.c
>>>> @@ -632,8 +632,10 @@ static int spi_geni_grab_gpi_chan(struct spi_geni_master *mas)
>>>>      return ret;
>>>>  }
>>>>
>>>> -static void spi_geni_release_dma_chan(struct spi_geni_master *mas)
>>>> +static void spi_geni_release_dma_chan(void *data)
>>>>  {
>>>> +    struct spi_geni_master *mas = data;
>>>> +
>>>>      if (mas->rx) {
>>>>              dma_release_channel(mas->rx);
>>>>              mas->rx = NULL;
>>>> @@ -1132,6 +1134,12 @@ static int spi_geni_probe(struct platform_device *pdev)
>>>>      if (ret)
>>>>              return ret;
>>>>
>>>> +    ret = devm_add_action_or_reset(dev, spi_geni_release_dma_chan, spi);
>>>
>>> This should be mas, not spi.
>>>
>>> Doesn't looks like this was tested. Please correct me if I'm wrong.
>>
>> Yes, you are right, the data should be struct spi_geni_master, which is
>> mas. Sorry, only compile passed.
> 
> Please perform a runtime test or mention it in the cover letter that
> it was only compile-tested.

Thank you! I'll add this information next version.

> 
> 
>