linux-kernel - Re: [PATCH v4 5/9] bus: mhi: core: Use generic name field for an MHI device

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Date:   Sat, 4 Jul 2020 20:38:19 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Bhaumik Bhatt <bbhatt@...eaurora.org>
Cc:     linux-arm-msm@...r.kernel.org, hemantk@...eaurora.org,
        jhugo@...eaurora.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 5/9] bus: mhi: core: Use generic name field for an MHI
 device

On Mon, Jun 29, 2020 at 09:39:38AM -0700, Bhaumik Bhatt wrote:
> An MHI device is not necessarily associated with only channels as we can
> have one associated with the controller itself. Hence, the chan_name
> field within the mhi_device structure should instead be replaced with a
> generic name to accurately reflect any type of MHI device.
> 
> Signed-off-by: Bhaumik Bhatt <bbhatt@...eaurora.org>
> Reviewed-by: Jeffrey Hugo <jhugo@...eaurora.org>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>

Thanks,
Mani

> ---
>  drivers/bus/mhi/core/init.c | 5 +++--
>  drivers/bus/mhi/core/main.c | 6 +++---
>  include/linux/mhi.h         | 8 ++++----
>  3 files changed, 10 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c
> index e43a190..e2011ec 100644
> --- a/drivers/bus/mhi/core/init.c
> +++ b/drivers/bus/mhi/core/init.c
> @@ -904,6 +904,7 @@ int mhi_register_controller(struct mhi_controller *mhi_cntrl,
>  	mhi_dev->dev_type = MHI_DEVICE_CONTROLLER;
>  	mhi_dev->mhi_cntrl = mhi_cntrl;
>  	dev_set_name(&mhi_dev->dev, "%s", dev_name(mhi_cntrl->cntrl_dev));
> +	mhi_dev->name = dev_name(mhi_cntrl->cntrl_dev);
>  
>  	/* Init wakeup source */
>  	device_init_wakeup(&mhi_dev->dev, true);
> @@ -1249,7 +1250,7 @@ static int mhi_uevent(struct device *dev, struct kobj_uevent_env *env)
>  	struct mhi_device *mhi_dev = to_mhi_device(dev);
>  
>  	return add_uevent_var(env, "MODALIAS=" MHI_DEVICE_MODALIAS_FMT,
> -					mhi_dev->chan_name);
> +					mhi_dev->name);
>  }
>  
>  static int mhi_match(struct device *dev, struct device_driver *drv)
> @@ -1266,7 +1267,7 @@ static int mhi_match(struct device *dev, struct device_driver *drv)
>  		return 0;
>  
>  	for (id = mhi_drv->id_table; id->chan[0]; id++)
> -		if (!strcmp(mhi_dev->chan_name, id->chan)) {
> +		if (!strcmp(mhi_dev->name, id->chan)) {
>  			mhi_dev->id = id;
>  			return 1;
>  		}
> diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c
> index 8d6ec34..3af0ce6 100644
> --- a/drivers/bus/mhi/core/main.c
> +++ b/drivers/bus/mhi/core/main.c
> @@ -249,7 +249,7 @@ int mhi_destroy_device(struct device *dev, void *data)
>  		put_device(&mhi_dev->dl_chan->mhi_dev->dev);
>  
>  	dev_dbg(&mhi_cntrl->mhi_dev->dev, "destroy device for chan:%s\n",
> -		 mhi_dev->chan_name);
> +		 mhi_dev->name);
>  
>  	/* Notify the client and remove the device from MHI bus */
>  	device_del(dev);
> @@ -327,10 +327,10 @@ void mhi_create_devices(struct mhi_controller *mhi_cntrl)
>  		}
>  
>  		/* Channel name is same for both UL and DL */
> -		mhi_dev->chan_name = mhi_chan->name;
> +		mhi_dev->name = mhi_chan->name;
>  		dev_set_name(&mhi_dev->dev, "%s_%s",
>  			     dev_name(mhi_cntrl->cntrl_dev),
> -			     mhi_dev->chan_name);
> +			     mhi_dev->name);
>  
>  		/* Init wakeup source if available */
>  		if (mhi_dev->dl_chan && mhi_dev->dl_chan->wake_capable)
> diff --git a/include/linux/mhi.h b/include/linux/mhi.h
> index b008914..7ed785e 100644
> --- a/include/linux/mhi.h
> +++ b/include/linux/mhi.h
> @@ -436,10 +436,10 @@ struct mhi_controller {
>  };
>  
>  /**
> - * struct mhi_device - Structure representing a MHI device which binds
> - *                     to channels
> + * struct mhi_device - Structure representing an MHI device which binds
> + *                     to channels or is associated with controllers
>   * @id: Pointer to MHI device ID struct
> - * @chan_name: Name of the channel to which the device binds
> + * @name: Name of the associated MHI device
>   * @mhi_cntrl: Controller the device belongs to
>   * @ul_chan: UL channel for the device
>   * @dl_chan: DL channel for the device
> @@ -451,7 +451,7 @@ struct mhi_controller {
>   */
>  struct mhi_device {
>  	const struct mhi_device_id *id;
> -	const char *chan_name;
> +	const char *name;
>  	struct mhi_controller *mhi_cntrl;
>  	struct mhi_chan *ul_chan;
>  	struct mhi_chan *dl_chan;
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>