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

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Message-ID: <Z55eWunU1NRkV2QP@gallifrey>
Date: Sat, 1 Feb 2025 17:48:10 +0000
From: "Dr. David Alan Gilbert" <linux@...blig.org>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.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

* Manivannan Sadhasivam (manivannan.sadhasivam@...aro.org) wrote:
> 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:"

Ah, do you need me to post a v2 for that?
> 
> > 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>

Thanks,

Dave

> - 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
> > 
> 
> -- 
> மணிவண்ணன் சதாசிவம்
-- 
 -----Open up your eyes, open up your mind, open up your code -------   
/ Dr. David Alan Gilbert    |       Running GNU/Linux       | Happy  \ 
\        dave @ treblig.org |                               | In Hex /
 \ _________________________|_____ http://www.treblig.org   |_______/