linux-kernel - Re: [PATCH v2 34/36] [RFC] coresight: Pass coresight_device for coresight_release_platform

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Message-ID: <20190429174045.GA18807@xps15>
Date:   Mon, 29 Apr 2019 11:40:45 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Suzuki K Poulose <suzuki.poulose@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        coresight@...ts.linaro.org, mike.leach@...aro.org,
        rjw@...ysocki.net, robert.walker@....com
Subject: Re: [PATCH v2 34/36] [RFC] coresight: Pass coresight_device for
 coresight_release_platform_data

On Mon, Apr 15, 2019 at 05:04:17PM +0100, Suzuki K Poulose wrote:
> As we prepare to expose the links between the devices in
> sysfs, pass the coresight_device instance to the
> coresight_release_platform_data in order to free up the connections
> when the device is removed.
> 
> No functional changes as such in this patch.
> 
> Cc: Mathieu Poirier <mathieu.poirier@...aro.org>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
> ---
>  drivers/hwtracing/coresight/coresight-platform.c | 2 +-
>  drivers/hwtracing/coresight/coresight-priv.h     | 3 ++-
>  drivers/hwtracing/coresight/coresight.c          | 7 ++++---
>  3 files changed, 7 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwtracing/coresight/coresight-platform.c
> index 224f698..6559c49 100644
> --- a/drivers/hwtracing/coresight/coresight-platform.c
> +++ b/drivers/hwtracing/coresight/coresight-platform.c
> @@ -734,7 +734,7 @@ coresight_get_platform_data(struct device *dev)
>  		return pdata;
>  
>  	/* Cleanup the connection information */
> -	coresight_release_platform_data(pdata);
> +	coresight_release_platform_data(NULL, pdata);
>  	return ret;
>  }
>  EXPORT_SYMBOL_GPL(coresight_get_platform_data);
> diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h
> index 61d7f9f..bf28ca9 100644
> --- a/drivers/hwtracing/coresight/coresight-priv.h
> +++ b/drivers/hwtracing/coresight/coresight-priv.h
> @@ -200,6 +200,7 @@ static inline void *coresight_get_uci_data(const struct amba_id *id)
>  	return 0;
>  }
>  
> -void coresight_release_platform_data(struct coresight_platform_data *pdata);
> +void coresight_release_platform_data(struct coresight_device *csdev,
> +				     struct coresight_platform_data *pdata);
>  
>  #endif
> diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
> index e3b9321..010bc86 100644
> --- a/drivers/hwtracing/coresight/coresight.c
> +++ b/drivers/hwtracing/coresight/coresight.c
> @@ -1173,7 +1173,8 @@ postcore_initcall(coresight_init);
>   * coresight_release_platform_data: Release references to the devices connected
>   * to the output port of this device.
>   */
> -void coresight_release_platform_data(struct coresight_platform_data *pdata)
> +void coresight_release_platform_data(struct coresight_device *csdev,
> +				     struct coresight_platform_data *pdata)
>  {
>  	int i;
>  
> @@ -1275,7 +1276,7 @@ struct coresight_device *coresight_register(struct coresight_desc *desc)
>  	kfree(csdev);
>  err_out:
>  	/* Cleanup the connection information */
> -	coresight_release_platform_data(desc->pdata);
> +	coresight_release_platform_data(NULL, desc->pdata);
>  	return ERR_PTR(ret);
>  }
>  EXPORT_SYMBOL_GPL(coresight_register);
> @@ -1285,7 +1286,7 @@ void coresight_unregister(struct coresight_device *csdev)
>  	etm_perf_del_symlink_sink(csdev);
>  	/* Remove references of that device in the topology */
>  	coresight_remove_conns(csdev);
> -	coresight_release_platform_data(csdev->pdata);
> +	coresight_release_platform_data(csdev, csdev->pdata);
>  	device_unregister(&csdev->dev);
>  }
>  EXPORT_SYMBOL_GPL(coresight_unregister);

Reviewed-by: Mathieu Poirier <mathieu.poirier@...aro.org>

> -- 
> 2.7.4
>