linux-kernel - Re: [PATCH] bus: mhi: Remove unused functions

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Message-ID: <20250201160721.bgfyi3cwilvibl74@thinkpad>
Date: Sat, 1 Feb 2025 21:37:21 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: linux@...blig.org
Cc: mhi@...ts.linux.dev, linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] bus: mhi: Remove unused functions

On Mon, Jan 27, 2025 at 09:58:59PM +0000, linux@...blig.org wrote:
> From: "Dr. David Alan Gilbert" <linux@...blig.org>
> 

Subject prefix should be:

'bus: mhi: host:"

> mhi_device_get() and mhi_queue_dma() haven't been used since 2020's
> commit 189ff97cca53 ("bus: mhi: core: Add support for data transfer")
> added them.
> 
> Remove them.
> 
> Note that mhi_queue_dma_sync() is used and has been left.
> 
> Signed-off-by: Dr. David Alan Gilbert <linux@...blig.org>

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

- Mani

> ---
>  drivers/bus/mhi/host/main.c | 19 -------------------
>  drivers/bus/mhi/host/pm.c   | 14 --------------
>  include/linux/mhi.h         | 18 ------------------
>  3 files changed, 51 deletions(-)
> 
> diff --git a/drivers/bus/mhi/host/main.c b/drivers/bus/mhi/host/main.c
> index 4de75674f193..4c91ffd6ed0e 100644
> --- a/drivers/bus/mhi/host/main.c
> +++ b/drivers/bus/mhi/host/main.c
> @@ -1181,25 +1181,6 @@ int mhi_queue_skb(struct mhi_device *mhi_dev, enum dma_data_direction dir,
>  }
>  EXPORT_SYMBOL_GPL(mhi_queue_skb);
>  
> -int mhi_queue_dma(struct mhi_device *mhi_dev, enum dma_data_direction dir,
> -		  struct mhi_buf *mhi_buf, size_t len, enum mhi_flags mflags)
> -{
> -	struct mhi_chan *mhi_chan = (dir == DMA_TO_DEVICE) ? mhi_dev->ul_chan :
> -							     mhi_dev->dl_chan;
> -	struct mhi_buf_info buf_info = { };
> -
> -	buf_info.p_addr = mhi_buf->dma_addr;
> -	buf_info.cb_buf = mhi_buf;
> -	buf_info.pre_mapped = true;
> -	buf_info.len = len;
> -
> -	if (unlikely(mhi_chan->pre_alloc))
> -		return -EINVAL;
> -
> -	return mhi_queue(mhi_dev, &buf_info, dir, mflags);
> -}
> -EXPORT_SYMBOL_GPL(mhi_queue_dma);
> -
>  int mhi_gen_tre(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan,
>  			struct mhi_buf_info *info, enum mhi_flags flags)
>  {
> diff --git a/drivers/bus/mhi/host/pm.c b/drivers/bus/mhi/host/pm.c
> index 11c0e751f223..2fb27e6f8f88 100644
> --- a/drivers/bus/mhi/host/pm.c
> +++ b/drivers/bus/mhi/host/pm.c
> @@ -1296,20 +1296,6 @@ int mhi_force_rddm_mode(struct mhi_controller *mhi_cntrl)
>  }
>  EXPORT_SYMBOL_GPL(mhi_force_rddm_mode);
>  
> -void mhi_device_get(struct mhi_device *mhi_dev)
> -{
> -	struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
> -
> -	mhi_dev->dev_wake++;
> -	read_lock_bh(&mhi_cntrl->pm_lock);
> -	if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
> -		mhi_trigger_resume(mhi_cntrl);
> -
> -	mhi_cntrl->wake_get(mhi_cntrl, true);
> -	read_unlock_bh(&mhi_cntrl->pm_lock);
> -}
> -EXPORT_SYMBOL_GPL(mhi_device_get);
> -
>  int mhi_device_get_sync(struct mhi_device *mhi_dev)
>  {
>  	struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
> diff --git a/include/linux/mhi.h b/include/linux/mhi.h
> index 059dc94d20bb..dd372b0123a6 100644
> --- a/include/linux/mhi.h
> +++ b/include/linux/mhi.h
> @@ -720,12 +720,6 @@ enum mhi_state mhi_get_mhi_state(struct mhi_controller *mhi_cntrl);
>   */
>  void mhi_soc_reset(struct mhi_controller *mhi_cntrl);
>  
> -/**
> - * mhi_device_get - Disable device low power mode
> - * @mhi_dev: Device associated with the channel
> - */
> -void mhi_device_get(struct mhi_device *mhi_dev);
> -
>  /**
>   * mhi_device_get_sync - Disable device low power mode. Synchronously
>   *                       take the controller out of suspended state
> @@ -776,18 +770,6 @@ int mhi_prepare_for_transfer_autoqueue(struct mhi_device *mhi_dev);
>   */
>  void mhi_unprepare_from_transfer(struct mhi_device *mhi_dev);
>  
> -/**
> - * mhi_queue_dma - Send or receive DMA mapped buffers from client device
> - *                 over MHI channel
> - * @mhi_dev: Device associated with the channels
> - * @dir: DMA direction for the channel
> - * @mhi_buf: Buffer for holding the DMA mapped data
> - * @len: Buffer length
> - * @mflags: MHI transfer flags used for the transfer
> - */
> -int mhi_queue_dma(struct mhi_device *mhi_dev, enum dma_data_direction dir,
> -		  struct mhi_buf *mhi_buf, size_t len, enum mhi_flags mflags);
> -
>  /**
>   * mhi_queue_buf - Send or receive raw buffers from client device over MHI
>   *                 channel
> -- 
> 2.48.1
> 

-- 
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