linux-kernel - [krzk-github:n/sm8450 35/58] drivers/soundwire/qcom.c:332:13: warning: unused variable 'rd_fifo_outstanding

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Message-ID: <202210260744.8FahRB1R-lkp@intel.com>
Date:   Wed, 26 Oct 2022 07:32:47 +0800
From:   kernel test robot <lkp@...el.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Krzysztof Kozlowski <krzk@...nel.org>
Subject: [krzk-github:n/sm8450 35/58] drivers/soundwire/qcom.c:332:13:
 warning: unused variable 'rd_fifo_outstanding_cmds'

tree:   https://github.com/krzk/linux n/sm8450
head:   57bf42faa17be40e013df8d598030f47956a7144
commit: 5ba47c0f678c51dc9359c8a7265d3b1cc81bbc48 [35/58] soundwire: qcom: wait for fifo to be empty before
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/krzk/linux/commit/5ba47c0f678c51dc9359c8a7265d3b1cc81bbc48
        git remote add krzk-github https://github.com/krzk/linux
        git fetch --no-tags krzk-github n/sm8450
        git checkout 5ba47c0f678c51dc9359c8a7265d3b1cc81bbc48
        # 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/soundwire/

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

All warnings (new ones prefixed by >>):

   drivers/soundwire/qcom.c: In function 'swrm_wait_for_wr_fifo_done':
>> drivers/soundwire/qcom.c:332:13: warning: unused variable 'rd_fifo_outstanding_cmds' [-Wunused-variable]
     332 |         u32 rd_fifo_outstanding_cmds;
         |             ^~~~~~~~~~~~~~~~~~~~~~~~


vim +/rd_fifo_outstanding_cmds +332 drivers/soundwire/qcom.c

   328	
   329	static bool swrm_wait_for_wr_fifo_done(struct qcom_swrm_ctrl *swrm)
   330	{
   331		u32 fifo_outstanding_cmds, value;
 > 332		u32 rd_fifo_outstanding_cmds;
   333		int fifo_retry_count = SWR_OVERFLOW_RETRY_COUNT*2;
   334	
   335		/* Check for fifo overflow during write */
   336		swrm->reg_read(swrm, SWRM_CMD_FIFO_STATUS, &value);
   337		fifo_outstanding_cmds = FIELD_GET(SWRM_WR_CMD_FIFO_CNT_MASK, value);
   338	
   339		if (fifo_outstanding_cmds) {
   340			while (fifo_retry_count) {
   341				usleep_range(500, 510);
   342				swrm->reg_read(swrm, SWRM_CMD_FIFO_STATUS, &value);
   343				fifo_outstanding_cmds = FIELD_GET(SWRM_WR_CMD_FIFO_CNT_MASK, value);
   344				fifo_retry_count--;
   345				if (fifo_outstanding_cmds == 0)
   346					return true;
   347			}
   348		} else {
   349			return true;
   350		}
   351	
   352	
   353		return false;
   354	}
   355	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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