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Date:   Wed, 20 Oct 2021 02:02:28 +0800
From:   kernel test robot <lkp@...el.com>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        mhi@...ts.linux.dev
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        loic.poulain@...aro.org, hemantk@...eaurora.org,
        bbhatt@...eaurora.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        netdev@...r.kernel.org
Subject: Re: [PATCH] bus: mhi: Add mhi_prepare_for_transfer_autoqueue API for
 DL auto queue

Hi Manivannan,

I love your patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.15-rc6 next-20211019]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Manivannan-Sadhasivam/bus-mhi-Add-mhi_prepare_for_transfer_autoqueue-API-for-DL-auto-queue/20211019-221447
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 519d81956ee277b4419c723adfb154603c2565ba
config: hexagon-randconfig-r041-20211019 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project b37efed957ed0a0193d80020aefd55cb587dfc1f)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/434ab9e12f5e85c6d84c1a0524d850559b058291
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Manivannan-Sadhasivam/bus-mhi-Add-mhi_prepare_for_transfer_autoqueue-API-for-DL-auto-queue/20211019-221447
        git checkout 434ab9e12f5e85c6d84c1a0524d850559b058291
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=hexagon 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/bus/mhi/core/main.c:1615:5: warning: no previous prototype for function '__mhi_prepare_for_transfer' [-Wmissing-prototypes]
   int __mhi_prepare_for_transfer(struct mhi_device *mhi_dev, unsigned int flags)
       ^
   drivers/bus/mhi/core/main.c:1615:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int __mhi_prepare_for_transfer(struct mhi_device *mhi_dev, unsigned int flags)
   ^
   static 
   1 warning generated.


vim +/__mhi_prepare_for_transfer +1615 drivers/bus/mhi/core/main.c

  1614	
> 1615	int __mhi_prepare_for_transfer(struct mhi_device *mhi_dev, unsigned int flags)
  1616	{
  1617		int ret, dir;
  1618		struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
  1619		struct mhi_chan *mhi_chan;
  1620	
  1621		for (dir = 0; dir < 2; dir++) {
  1622			mhi_chan = dir ? mhi_dev->dl_chan : mhi_dev->ul_chan;
  1623			if (!mhi_chan)
  1624				continue;
  1625	
  1626			ret = mhi_prepare_channel(mhi_cntrl, mhi_chan, flags);
  1627			if (ret)
  1628				goto error_open_chan;
  1629		}
  1630	
  1631		return 0;
  1632	
  1633	error_open_chan:
  1634		for (--dir; dir >= 0; dir--) {
  1635			mhi_chan = dir ? mhi_dev->dl_chan : mhi_dev->ul_chan;
  1636			if (!mhi_chan)
  1637				continue;
  1638	
  1639			mhi_unprepare_channel(mhi_cntrl, mhi_chan);
  1640		}
  1641	
  1642		return ret;
  1643	}
  1644	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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