Re: crypto: ccp - Release dma channels before dmaengine unrgister

[kernel test robot <lkp@intel.com>]

Hi Koba,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on herbert-cryptodev-2.6/master]
[also build test WARNING on herbert-crypto-2.6/master linus/master v6.0-rc3 next-20220830]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Koba-Ko/crypto-ccp-Release-dma-channels-before-dmaengine-unrgister/20220830-173803
base:   https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20220831/202208310843.cesiRP88-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/5aa373b58528f3f99c5a010e76728776f0240603
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Koba-Ko/crypto-ccp-Release-dma-channels-before-dmaengine-unrgister/20220830-173803
        git checkout 5aa373b58528f3f99c5a010e76728776f0240603
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/crypto/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/crypto/ccp/ccp-dmaengine.c: In function 'ccp_dmaengine_unregister':
>> drivers/crypto/ccp/ccp-dmaengine.c:770:22: warning: unused variable 'i' [-Wunused-variable]
     770 |         unsigned int i;
         |                      ^
>> drivers/crypto/ccp/ccp-dmaengine.c:769:26: warning: unused variable 'dma_chan' [-Wunused-variable]
     769 |         struct dma_chan *dma_chan;
         |                          ^~~~~~~~


vim +/i +770 drivers/crypto/ccp/ccp-dmaengine.c

   765	
   766	void ccp_dmaengine_unregister(struct ccp_device *ccp)
   767	{
   768		struct dma_device *dma_dev = &ccp->dma_dev;
 > 769		struct dma_chan *dma_chan;
 > 770		unsigned int i;

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