sound/soc/sof/intel/hda-dai.c:265:22: warning: Value stored to 'sdev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]

* sound/soc/sof/intel/hda-dai.c:265:22: warning: Value stored to 'sdev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
@ 2021-08-24  5:05 ` kernel test robot
  0 siblings, 0 replies; 6+ messages in thread
From: kernel test robot @ 2021-08-24  5:05 UTC (permalink / raw)
  To: Pierre-Louis Bossart
  Cc: clang-built-linux, kbuild-all, linux-kernel, Takashi Iwai,
	Kai Vehmanen, Guennadi Liakhovetski, Bard Liao

[-- Attachment #1: Type: text/plain, Size: 45611 bytes --]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   d5ae8d7f85b7f6f6e60f1af8ff4be52b0926fde1
commit: 8d4ba1be3d2257606e04aff412829d8972670750 ASoC: SOF: pci: split PCI into different drivers
date:   6 months ago
config: arm-randconfig-c002-20210820 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d9c5613e856cf2addfbf892fc4c1ce9ef9feceaa)
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
        # install arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8d4ba1be3d2257606e04aff412829d8972670750
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 8d4ba1be3d2257606e04aff412829d8972670750
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm clang-analyzer 

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


clang-analyzer warnings: (new ones prefixed by >>)
   kernel/workqueue.c:2602:14: note: Value stored to 'target_func' during its initialization is never read
           work_func_t target_func = target_work ? target_work->func : NULL;
                       ^~~~~~~~~~~   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (2 in non-user code, 1 with check filters).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   4 warnings generated.
   drivers/iio/gyro/mpu3050-core.c:550:4: warning: Value stored to 'ret' is never read [clang-analyzer-deadcode.DeadStores]
                           ret = regmap_bulk_read(mpu3050->map,
                           ^     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/iio/gyro/mpu3050-core.c:550:4: note: Value stored to 'ret' is never read
                           ret = regmap_bulk_read(mpu3050->map,
                           ^     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   4 warnings generated.
   drivers/block/rsxx/core.c:684:2: warning: Value stored to 'st' is never read [clang-analyzer-deadcode.DeadStores]
           st = ioread32(card->regmap + ISR);
           ^
   drivers/block/rsxx/core.c:684:2: note: Value stored to 'st' is never read
   Suppressed 3 warnings (2 in non-user code, 1 with check filters).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
>> sound/soc/sof/intel/hda-dai.c:265:22: warning: Value stored to 'sdev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
           struct snd_sof_dev *sdev =
                               ^~~~
   sound/soc/sof/intel/hda-dai.c:265:22: note: Value stored to 'sdev' during its initialization is never read
           struct snd_sof_dev *sdev =
                               ^~~~
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   drivers/input/misc/ad714x.c:1014:2: warning: Value stored to 'drv_mem' is never read [clang-analyzer-deadcode.DeadStores]
           drv_mem += sizeof(*bt_drv) * ad714x->hw->button_num;
           ^          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/input/misc/ad714x.c:1014:2: note: Value stored to 'drv_mem' is never read
           drv_mem += sizeof(*bt_drv) * ad714x->hw->button_num;
           ^          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   drivers/input/misc/atmel_captouch.c:68:8: warning: Excessive padding in 'struct atmel_captouch_device' (75 padding bytes, where 11 is optimal). 
   Optimal fields order: 
   xfer_buf, 
   client, 
   input, 
   num_btn, 
   keycodes, 
   prev_btn, 
   consider reordering the fields or adding explicit padding members [clang-analyzer-optin.performance.Padding]
   struct atmel_captouch_device {
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
   drivers/input/misc/atmel_captouch.c:68:8: note: Excessive padding in 'struct atmel_captouch_device' (75 padding bytes, where 11 is optimal). Optimal fields order: xfer_buf, client, input, num_btn, keycodes, prev_btn, consider reordering the fields or adding explicit padding members
   struct atmel_captouch_device {
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   6 warnings generated.
   drivers/scsi/aic7xxx/aic7xxx_pci.c:716:2: warning: Value stored to 'our_id' is never read [clang-analyzer-deadcode.DeadStores]
           our_id = 0;
           ^        ~
   drivers/scsi/aic7xxx/aic7xxx_pci.c:716:2: note: Value stored to 'our_id' is never read
           our_id = 0;
           ^        ~
   drivers/scsi/aic7xxx/aic7xxx_pci.c:1076:2: warning: Value stored to 'num_scbs' is never read [clang-analyzer-deadcode.DeadStores]
           num_scbs = 0;
           ^          ~
   drivers/scsi/aic7xxx/aic7xxx_pci.c:1076:2: note: Value stored to 'num_scbs' is never read
           num_scbs = 0;
           ^          ~
   drivers/scsi/aic7xxx/aic7xxx_pci.c:1540:29: warning: The left operand of '|' is a garbage value [clang-analyzer-core.UndefinedBinaryOperatorResult]
           SEEPROM_OUTB(sd, sd->sd_MS | sd->sd_CS);
                                      ^
   drivers/scsi/aic7xxx/aic7xxx_pci.c:2026:6: note: Assuming the condition is true
           if ((ahc->flags & AHC_HAS_TERM_LOGIC) != 0) {
               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/scsi/aic7xxx/aic7xxx_pci.c:2026:2: note: Taking true branch
           if ((ahc->flags & AHC_HAS_TERM_LOGIC) != 0) {
           ^
   drivers/scsi/aic7xxx/aic7xxx_pci.c:2035:3: note: Calling 'ahc_acquire_seeprom'
                   ahc_acquire_seeprom(ahc, &sd);
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/scsi/aic7xxx/aic7xxx_pci.c:1836:6: note: Assuming the condition is true
           if ((ahc->features & AHC_SPIOCAP) != 0
               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/scsi/aic7xxx/aic7xxx_pci.c:1836:6: note: Left side of '&&' is true
   drivers/scsi/aic7xxx/aic7xxx_pci.c:1837:6: note: Assuming the condition is true
            && (ahc_inb(ahc, SPIOCAP) & SEEPROM) == 0)
--
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   drivers/mtd/nand/raw/marvell_nand.c:2775:26: warning: Value stored to 'pdev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
           struct platform_device *pdev = container_of(nfc->dev,
                                   ^~~~
   drivers/mtd/nand/raw/marvell_nand.c:2775:26: note: Value stored to 'pdev' during its initialization is never read
           struct platform_device *pdev = container_of(nfc->dev,
                                   ^~~~
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   4 warnings generated.
   sound/soc/codecs/wm8731.c:106:3: warning: Value stored to 'best' is never read [clang-analyzer-deadcode.DeadStores]
                   best = 0;
                   ^      ~
   sound/soc/codecs/wm8731.c:106:3: note: Value stored to 'best' is never read
                   best = 0;
                   ^      ~
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   4 warnings generated.
>> sound/soc/sof/intel/cnl.c:50:3: warning: Value stored to 'msg_ext' is never read [clang-analyzer-deadcode.DeadStores]
                   msg_ext = hipci & CNL_DSP_REG_HIPCIDR_MSG_MASK;
                   ^         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   sound/soc/sof/intel/cnl.c:50:3: note: Value stored to 'msg_ext' is never read
                   msg_ext = hipci & CNL_DSP_REG_HIPCIDR_MSG_MASK;
                   ^         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> sound/soc/sof/intel/cnl.c:77:3: warning: Value stored to 'msg' is never read [clang-analyzer-deadcode.DeadStores]
                   msg = hipctdr & CNL_DSP_REG_HIPCTDR_MSG_MASK;
                   ^     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   sound/soc/sof/intel/cnl.c:77:3: note: Value stored to 'msg' is never read
                   msg = hipctdr & CNL_DSP_REG_HIPCTDR_MSG_MASK;
                   ^     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   4 warnings generated.
   drivers/mtd/tests/pagetest.c:214:2: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
           strcpy(writebuf, "There is no data like this!");
           ^~~~~~
   drivers/mtd/tests/pagetest.c:214:2: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
           strcpy(writebuf, "There is no data like this!");
           ^~~~~~
   drivers/mtd/tests/pagetest.c:239:2: warning: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119 [clang-analyzer-security.insecureAPI.strcpy]
           strcpy(writebuf, "There is no data like this!");
           ^~~~~~
   drivers/mtd/tests/pagetest.c:239:2: note: Call to function 'strcpy' is insecure as it does not provide bounding of the memory buffer. Replace unbounded copy functions with analogous functions that support length arguments such as 'strlcpy'. CWE-119
           strcpy(writebuf, "There is no data like this!");
           ^~~~~~
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   4 warnings generated.
   6 warnings generated.
   8 warnings generated.
   10 warnings generated.
   12 warnings generated.
   14 warnings generated.
   16 warnings generated.
   Suppressed 16 warnings (16 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   4 warnings generated.
   6 warnings generated.
   8 warnings generated.
   10 warnings generated.
   12 warnings generated.
   14 warnings generated.
   16 warnings generated.
   Suppressed 16 warnings (16 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   4 warnings generated.
   6 warnings generated.
   8 warnings generated.
   10 warnings generated.
   12 warnings generated.
   14 warnings generated.
   16 warnings generated.
   Suppressed 16 warnings (16 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
--
                                   ^~~~   ~~~~~~~~~~~~~~~~
   sound/soc/fsl/fsl_spdif.c:300:26: note: Value stored to 'pdev' during its initialization is never read
           struct platform_device *pdev = spdif_priv->pdev;
                                   ^~~~   ~~~~~~~~~~~~~~~~
   sound/soc/fsl/fsl_spdif.c:402:26: warning: Value stored to 'pdev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
           struct platform_device *pdev = spdif_priv->pdev;
                                   ^~~~   ~~~~~~~~~~~~~~~~
   sound/soc/fsl/fsl_spdif.c:402:26: note: Value stored to 'pdev' during its initialization is never read
           struct platform_device *pdev = spdif_priv->pdev;
                                   ^~~~   ~~~~~~~~~~~~~~~~
   sound/soc/fsl/fsl_spdif.c:882:26: warning: Value stored to 'pdev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
           struct platform_device *pdev = spdif_priv->pdev;
                                   ^~~~   ~~~~~~~~~~~~~~~~
   sound/soc/fsl/fsl_spdif.c:882:26: note: Value stored to 'pdev' during its initialization is never read
           struct platform_device *pdev = spdif_priv->pdev;
                                   ^~~~   ~~~~~~~~~~~~~~~~
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   6 warnings generated.
   sound/soc/codecs/wm8994.c:1450:28: warning: Value stored to 'component' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
           struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
                                     ^~~~~~~~~   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   sound/soc/codecs/wm8994.c:1450:28: note: Value stored to 'component' during its initialization is never read
           struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
                                     ^~~~~~~~~   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   sound/soc/codecs/wm8994.c:3345:28: warning: Value stored to 'component' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
           struct snd_soc_component *component = wm8994->hubs.component;
                                     ^~~~~~~~~   ~~~~~~~~~~~~~~~~~~~~~~
   sound/soc/codecs/wm8994.c:3345:28: note: Value stored to 'component' during its initialization is never read
           struct snd_soc_component *component = wm8994->hubs.component;
                                     ^~~~~~~~~   ~~~~~~~~~~~~~~~~~~~~~~
   sound/soc/codecs/wm8994.c:3703:17: warning: Value stored to 'dev' during its initialization is never read [clang-analyzer-deadcode.DeadStores]
           struct device *dev = wm8994->wm8994->dev;
                          ^~~   ~~~~~~~~~~~~~~~~~~~
   sound/soc/codecs/wm8994.c:3703:17: note: Value stored to 'dev' during its initialization is never read
           struct device *dev = wm8994->wm8994->dev;
                          ^~~   ~~~~~~~~~~~~~~~~~~~
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   3 warnings generated.
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   4 warnings generated.
>> sound/soc/sof/intel/hda-ipc.c:150:3: warning: Value stored to 'msg_ext' is never read [clang-analyzer-deadcode.DeadStores]
                   msg_ext = hipcie & HDA_DSP_REG_HIPCIE_MSG_MASK;
                   ^         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   sound/soc/sof/intel/hda-ipc.c:150:3: note: Value stored to 'msg_ext' is never read
                   msg_ext = hipcie & HDA_DSP_REG_HIPCIE_MSG_MASK;
                   ^         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> sound/soc/sof/intel/hda-ipc.c:187:3: warning: Value stored to 'msg' is never read [clang-analyzer-deadcode.DeadStores]
                   msg = hipct & HDA_DSP_REG_HIPCT_MSG_MASK;
                   ^     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   sound/soc/sof/intel/hda-ipc.c:187:3: note: Value stored to 'msg' is never read
                   msg = hipct & HDA_DSP_REG_HIPCT_MSG_MASK;
                   ^     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   2 warnings generated.
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   4 warnings generated.
   drivers/ata/libata-pata-timings.c:78:14: warning: Assigned value is garbage or undefined [clang-analyzer-core.uninitialized.Assign]
                   m->setup = max(a->setup, b->setup);
                              ^
   include/linux/minmax.h:58:19: note: expanded from macro 'max'
   #define max(x, y)       __careful_cmp(x, y, >)
                           ^
   include/linux/minmax.h:44:3: note: expanded from macro '__careful_cmp'
                   __cmp_once(x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y), op))
                   ^
   include/linux/minmax.h:37:3: note: expanded from macro '__cmp_once'
                   typeof(x) unique_x = (x);               \
                   ^
   drivers/ata/libata-pata-timings.c:126:7: note: 's' is non-null
           if (!s)
                ^
   drivers/ata/libata-pata-timings.c:126:2: note: Taking false branch
           if (!s)
           ^
   drivers/ata/libata-pata-timings.c:136:6: note: Assuming the condition is false
           if (id[ATA_ID_FIELD_VALID] & 2) {       /* EIDE drive */
               ^~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/ata/libata-pata-timings.c:136:2: note: Taking false branch
           if (id[ATA_ID_FIELD_VALID] & 2) {       /* EIDE drive */
           ^
   drivers/ata/libata-pata-timings.c:163:6: note: Assuming 'speed' is > XFER_PIO_6
           if (speed > XFER_PIO_6) {
               ^~~~~~~~~~~~~~~~~~
   drivers/ata/libata-pata-timings.c:163:2: note: Taking true branch
           if (speed > XFER_PIO_6) {
           ^
   drivers/ata/libata-pata-timings.c:164:3: note: Calling 'ata_timing_compute'
                   ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/ata/libata-pata-timings.c:126:6: note: Assuming 's' is null
           if (!s)
               ^~
   drivers/ata/libata-pata-timings.c:126:2: note: Taking true branch
           if (!s)
           ^
   drivers/ata/libata-pata-timings.c:127:3: note: Returning without writing to 't->setup'
                   return -EINVAL;
                   ^
   drivers/ata/libata-pata-timings.c:164:3: note: Returning from 'ata_timing_compute'
                   ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/ata/libata-pata-timings.c:165:3: note: Calling 'ata_timing_merge'
                   ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/ata/libata-pata-timings.c:77:2: note: Taking true branch
           if (what & ATA_TIMING_SETUP)
           ^
   drivers/ata/libata-pata-timings.c:78:14: note: Assigned value is garbage or undefined
                   m->setup = max(a->setup, b->setup);
                              ^
   include/linux/minmax.h:58:19: note: expanded from macro 'max'
   #define max(x, y)       __careful_cmp(x, y, >)
                           ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:44:3: note: expanded from macro '__careful_cmp'
                   __cmp_once(x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y), op))
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:37:3: note: expanded from macro '__cmp_once'
                   typeof(x) unique_x = (x);               \
                   ^                    ~~~
   Suppressed 3 warnings (3 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   6 warnings generated.
   Suppressed 6 warnings (4 in non-user code, 2 with check filters).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   4 warnings generated.
   drivers/target/target_core_rd.c:95:2: warning: Value stored to 'page_count' is never read [clang-analyzer-deadcode.DeadStores]
           page_count = rd_release_sgl_table(rd_dev, rd_dev->sg_table_array,
           ^            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/target/target_core_rd.c:95:2: note: Value stored to 'page_count' is never read
           page_count = rd_release_sgl_table(rd_dev, rd_dev->sg_table_array,
           ^            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/target/target_core_rd.c:221:2: warning: Value stored to 'page_count' is never read [clang-analyzer-deadcode.DeadStores]
           page_count = rd_release_sgl_table(rd_dev, rd_dev->sg_prot_array,
           ^            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/target/target_core_rd.c:221:2: note: Value stored to 'page_count' is never read
           page_count = rd_release_sgl_table(rd_dev, rd_dev->sg_prot_array,
           ^            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   Suppressed 2 warnings (2 in non-user code).
   Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
   4 warnings generated.
   fs/gfs2/ops_fstype.c:842:2: warning: Value stored to 'jindex' is never read [clang-analyzer-deadcode.DeadStores]
           jindex = 0;

vim +/sdev +265 sound/soc/sof/intel/hda-dai.c

fdd961e37e47f2 Keyon Jie         2019-04-12  259  
fdd961e37e47f2 Keyon Jie         2019-04-12  260  static int hda_link_pcm_prepare(struct snd_pcm_substream *substream,
fdd961e37e47f2 Keyon Jie         2019-04-12  261  				struct snd_soc_dai *dai)
fdd961e37e47f2 Keyon Jie         2019-04-12  262  {
ed3baacd76baa0 Ranjani Sridharan 2019-04-30  263  	struct hdac_ext_stream *link_dev =
ed3baacd76baa0 Ranjani Sridharan 2019-04-30  264  				snd_soc_dai_get_dma_data(dai, substream);
fdd961e37e47f2 Keyon Jie         2019-04-12 @265  	struct snd_sof_dev *sdev =
fdd961e37e47f2 Keyon Jie         2019-04-12  266  				snd_soc_component_get_drvdata(dai->component);
1205300af9dba3 Kuninori Morimoto 2020-07-20  267  	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
fdd961e37e47f2 Keyon Jie         2019-04-12  268  	int stream = substream->stream;
fdd961e37e47f2 Keyon Jie         2019-04-12  269  
a3ebccb52efdfb Kai Vehmanen      2019-07-22  270  	if (link_dev->link_prepared)
fdd961e37e47f2 Keyon Jie         2019-04-12  271  		return 0;
fdd961e37e47f2 Keyon Jie         2019-04-12  272  
ed3baacd76baa0 Ranjani Sridharan 2019-04-30  273  	dev_dbg(sdev->dev, "hda: prepare stream dir %d\n", substream->stream);
fdd961e37e47f2 Keyon Jie         2019-04-12  274  
fdd961e37e47f2 Keyon Jie         2019-04-12  275  	return hda_link_hw_params(substream, &rtd->dpcm[stream].hw_params,
fdd961e37e47f2 Keyon Jie         2019-04-12  276  				  dai);
fdd961e37e47f2 Keyon Jie         2019-04-12  277  }
fdd961e37e47f2 Keyon Jie         2019-04-12  278  

:::::: The code at line 265 was first introduced by commit
:::::: fdd961e37e47f2d450638f3a653cdb96911969ea ASoC: SOF: Intel: add SKL+ platform DAIs

:::::: TO: Keyon Jie <yang.jie@linux.intel.com>
:::::: CC: Mark Brown <broonie@kernel.org>

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

[-- Attachment #2: .config.gz --]
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