Re: [PATCH v2] ASoC: ti: omap-mcbsp: duplicate sysfs error

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Hi David,

On 6/15/22 18:09, David Owens wrote:
> Convert to managed versions of sysfs and clk allocation to simplify
> unbinding and error handling in probe.  Managed sysfs node
> creation specifically addresses the following error seen the second time
> probe is attempted after sdma_pcm_platform_register() previously requsted
> probe deferral:
> 
> sysfs: cannot create duplicate filename '/devices/platform/68000000.ocp/49022000.mcbsp/max_tx_thres'

I have tried to looked up devm_sysfs_remove_group(), which did not
existed, but you found the correct devm ;)

Looks good, thank you!

Acked-by: Peter Ujfalusi <peter.ujfalusi@xxxxxxxxx>


> Signed-off-by: David Owens <dowens@xxxxxxxxxxxxxxxxxxxxx>
> ---
>  sound/soc/ti/omap-mcbsp-priv.h |  2 --
>  sound/soc/ti/omap-mcbsp-st.c   | 21 ++++-----------------
>  sound/soc/ti/omap-mcbsp.c      | 26 ++++----------------------
>  3 files changed, 8 insertions(+), 41 deletions(-)
> 
> diff --git a/sound/soc/ti/omap-mcbsp-priv.h b/sound/soc/ti/omap-mcbsp-priv.h
> index 7865cda4bf0a..da519ea1f303 100644
> --- a/sound/soc/ti/omap-mcbsp-priv.h
> +++ b/sound/soc/ti/omap-mcbsp-priv.h
> @@ -316,8 +316,6 @@ static inline int omap_mcbsp_read(struct omap_mcbsp *mcbsp, u16 reg,
> 
>  /* Sidetone specific API */
>  int omap_mcbsp_st_init(struct platform_device *pdev);
> -void omap_mcbsp_st_cleanup(struct platform_device *pdev);
> -
>  int omap_mcbsp_st_start(struct omap_mcbsp *mcbsp);
>  int omap_mcbsp_st_stop(struct omap_mcbsp *mcbsp);
> 
> diff --git a/sound/soc/ti/omap-mcbsp-st.c b/sound/soc/ti/omap-mcbsp-st.c
> index 0bc7d26c660a..402a57a502e6 100644
> --- a/sound/soc/ti/omap-mcbsp-st.c
> +++ b/sound/soc/ti/omap-mcbsp-st.c
> @@ -292,14 +292,11 @@ static ssize_t st_taps_store(struct device *dev,
> 
>  static DEVICE_ATTR_RW(st_taps);
> 
> -static const struct attribute *sidetone_attrs[] = {
> +static struct attribute *sidetone_attrs[] = {
>         &dev_attr_st_taps.attr,
>         NULL,
>  };
> -
> -static const struct attribute_group sidetone_attr_group = {
> -       .attrs = (struct attribute **)sidetone_attrs,
> -};
> +ATTRIBUTE_GROUPS(sidetone);
> 
>  int omap_mcbsp_st_start(struct omap_mcbsp *mcbsp)
>  {
> @@ -347,7 +344,7 @@ int omap_mcbsp_st_init(struct platform_device *pdev)
>         if (!st_data)
>                 return -ENOMEM;
> 
> -       st_data->mcbsp_iclk = clk_get(mcbsp->dev, "ick");
> +       st_data->mcbsp_iclk = devm_clk_get(mcbsp->dev, "ick");
>         if (IS_ERR(st_data->mcbsp_iclk)) {
>                 dev_warn(mcbsp->dev,
>                          "Failed to get ick, sidetone might be broken\n");
> @@ -359,7 +356,7 @@ int omap_mcbsp_st_init(struct platform_device *pdev)
>         if (!st_data->io_base_st)
>                 return -ENOMEM;
> 
> -       ret = sysfs_create_group(&mcbsp->dev->kobj, &sidetone_attr_group);
> +       ret = devm_device_add_group(mcbsp->dev, &sidetone_group);
>         if (ret)
>                 return ret;
> 
> @@ -368,16 +365,6 @@ int omap_mcbsp_st_init(struct platform_device *pdev)
>         return 0;
>  }
> 
> -void omap_mcbsp_st_cleanup(struct platform_device *pdev)
> -{
> -       struct omap_mcbsp *mcbsp = platform_get_drvdata(pdev);
> -
> -       if (mcbsp->st_data) {
> -               sysfs_remove_group(&mcbsp->dev->kobj, &sidetone_attr_group);
> -               clk_put(mcbsp->st_data->mcbsp_iclk);
> -       }
> -}
> -
>  static int omap_mcbsp_st_info_volsw(struct snd_kcontrol *kcontrol,
>                                     struct snd_ctl_elem_info *uinfo)
>  {
> diff --git a/sound/soc/ti/omap-mcbsp.c b/sound/soc/ti/omap-mcbsp.c
> index 4479d74f0a45..395493a2d965 100644
> --- a/sound/soc/ti/omap-mcbsp.c
> +++ b/sound/soc/ti/omap-mcbsp.c
> @@ -595,16 +595,13 @@ static ssize_t dma_op_mode_store(struct device *dev,
> 
>  static DEVICE_ATTR_RW(dma_op_mode);
> 
> -static const struct attribute *additional_attrs[] = {
> +static struct attribute *additional_attrs[] = {
>         &dev_attr_max_tx_thres.attr,
>         &dev_attr_max_rx_thres.attr,
>         &dev_attr_dma_op_mode.attr,
>         NULL,
>  };
> -
> -static const struct attribute_group additional_attr_group = {
> -       .attrs = (struct attribute **)additional_attrs,
> -};
> +ATTRIBUTE_GROUPS(additional);
> 
>  /*
>   * McBSP1 and McBSP3 are directly mapped on 1610 and 1510.
> @@ -702,8 +699,7 @@ static int omap_mcbsp_init(struct platform_device *pdev)
>                 mcbsp->max_tx_thres = max_thres(mcbsp) - 0x10;
>                 mcbsp->max_rx_thres = max_thres(mcbsp) - 0x10;
> 
> -               ret = sysfs_create_group(&mcbsp->dev->kobj,
> -                                        &additional_attr_group);
> +               ret = devm_device_add_group(mcbsp->dev, &additional_group);
>                 if (ret) {
>                         dev_err(mcbsp->dev,
>                                 "Unable to create additional controls\n");
> @@ -711,16 +707,7 @@ static int omap_mcbsp_init(struct platform_device *pdev)
>                 }
>         }
> 
> -       ret = omap_mcbsp_st_init(pdev);
> -       if (ret)
> -               goto err_st;
> -
> -       return 0;
> -
> -err_st:
> -       if (mcbsp->pdata->buffer_size)
> -               sysfs_remove_group(&mcbsp->dev->kobj, &additional_attr_group);
> -       return ret;
> +       return omap_mcbsp_st_init(pdev);
>  }
> 
>  /*
> @@ -1431,11 +1418,6 @@ static int asoc_mcbsp_remove(struct platform_device *pdev)
>         if (cpu_latency_qos_request_active(&mcbsp->pm_qos_req))
>                 cpu_latency_qos_remove_request(&mcbsp->pm_qos_req);
> 
> -       if (mcbsp->pdata->buffer_size)
> -               sysfs_remove_group(&mcbsp->dev->kobj, &additional_attr_group);
> -
> -       omap_mcbsp_st_cleanup(pdev);
> -
>         return 0;
>  }
> 
> --
> 2.34.1
> 
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-- 
Péter



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