sound/pci/cmipci.c:3235:2: warning: Value stored to 'cm' is never read [clang-analyzer-deadcode.DeadStores]

sound/pci/cmipci.c:3235:2: warning: Value stored to 'cm' is never read [clang-analyzer-deadcode.DeadStores]

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   6b75d88fa81b122cce37ebf17428a849ccd3d0f1
commit: 87e082ad84a7e1f022be168396ff1cb93a80c557 ALSA: cmipci: Allocate resources with device-managed APIs
date:   4 months ago
config: i386-randconfig-c001-20211012 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c3dcf39554dbea780d6cb7e12239451ba47a2668)
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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=87e082ad84a7e1f022be168396ff1cb93a80c557
         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
         git fetch --no-tags linus master
         git checkout 87e082ad84a7e1f022be168396ff1cb93a80c557
         # save the attached .config to linux build tree
         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=i386 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 >>)

 >> sound/pci/cmipci.c:3235:2: warning: Value stored to 'cm' is never read [clang-analyzer-deadcode.DeadStores]
            cm = card->private_data;
            ^    ~~~~~~~~~~~~~~~~~~

vim +/cm +3235 sound/pci/cmipci.c

^1da177e4c3f41 Linus Torvalds 2005-04-16  3215
e23e7a14362072 Bill Pemberton 2012-12-06  3216  static int snd_cmipci_probe(struct pci_dev *pci,
^1da177e4c3f41 Linus Torvalds 2005-04-16  3217  			    const struct pci_device_id *pci_id)
^1da177e4c3f41 Linus Torvalds 2005-04-16  3218  {
^1da177e4c3f41 Linus Torvalds 2005-04-16  3219  	static int dev;
2cbdb686dd8df8 Takashi Iwai   2005-11-17  3220  	struct snd_card *card;
2cbdb686dd8df8 Takashi Iwai   2005-11-17  3221  	struct cmipci *cm;
^1da177e4c3f41 Linus Torvalds 2005-04-16  3222  	int err;
^1da177e4c3f41 Linus Torvalds 2005-04-16  3223
^1da177e4c3f41 Linus Torvalds 2005-04-16  3224  	if (dev >= SNDRV_CARDS)
^1da177e4c3f41 Linus Torvalds 2005-04-16  3225  		return -ENODEV;
^1da177e4c3f41 Linus Torvalds 2005-04-16  3226  	if (! enable[dev]) {
^1da177e4c3f41 Linus Torvalds 2005-04-16  3227  		dev++;
^1da177e4c3f41 Linus Torvalds 2005-04-16  3228  		return -ENOENT;
^1da177e4c3f41 Linus Torvalds 2005-04-16  3229  	}
^1da177e4c3f41 Linus Torvalds 2005-04-16  3230
87e082ad84a7e1 Takashi Iwai   2021-07-15  3231  	err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
87e082ad84a7e1 Takashi Iwai   2021-07-15  3232  				sizeof(*cm), &card);
e58de7baf7de11 Takashi Iwai   2008-12-28  3233  	if (err < 0)
e58de7baf7de11 Takashi Iwai   2008-12-28  3234  		return err;
87e082ad84a7e1 Takashi Iwai   2021-07-15 @3235  	cm = card->private_data;
^1da177e4c3f41 Linus Torvalds 2005-04-16  3236  	
^1da177e4c3f41 Linus Torvalds 2005-04-16  3237  	switch (pci->device) {
^1da177e4c3f41 Linus Torvalds 2005-04-16  3238  	case PCI_DEVICE_ID_CMEDIA_CM8738:
^1da177e4c3f41 Linus Torvalds 2005-04-16  3239  	case PCI_DEVICE_ID_CMEDIA_CM8738B:
^1da177e4c3f41 Linus Torvalds 2005-04-16  3240  		strcpy(card->driver, "CMI8738");
^1da177e4c3f41 Linus Torvalds 2005-04-16  3241  		break;
^1da177e4c3f41 Linus Torvalds 2005-04-16  3242  	case PCI_DEVICE_ID_CMEDIA_CM8338A:
^1da177e4c3f41 Linus Torvalds 2005-04-16  3243  	case PCI_DEVICE_ID_CMEDIA_CM8338B:
^1da177e4c3f41 Linus Torvalds 2005-04-16  3244  		strcpy(card->driver, "CMI8338");
^1da177e4c3f41 Linus Torvalds 2005-04-16  3245  		break;
^1da177e4c3f41 Linus Torvalds 2005-04-16  3246  	default:
^1da177e4c3f41 Linus Torvalds 2005-04-16  3247  		strcpy(card->driver, "CMIPCI");
^1da177e4c3f41 Linus Torvalds 2005-04-16  3248  		break;
^1da177e4c3f41 Linus Torvalds 2005-04-16  3249  	}
^1da177e4c3f41 Linus Torvalds 2005-04-16  3250
87e082ad84a7e1 Takashi Iwai   2021-07-15  3251  	err = snd_cmipci_create(card, pci, dev);
e17a85eccfa0b7 Markus Elfring 2017-08-22  3252  	if (err < 0)
87e082ad84a7e1 Takashi Iwai   2021-07-15  3253  		return err;
^1da177e4c3f41 Linus Torvalds 2005-04-16  3254
e17a85eccfa0b7 Markus Elfring 2017-08-22  3255  	err = snd_card_register(card);
e17a85eccfa0b7 Markus Elfring 2017-08-22  3256  	if (err < 0)
87e082ad84a7e1 Takashi Iwai   2021-07-15  3257  		return err;
e17a85eccfa0b7 Markus Elfring 2017-08-22  3258
^1da177e4c3f41 Linus Torvalds 2005-04-16  3259  	pci_set_drvdata(pci, card);
^1da177e4c3f41 Linus Torvalds 2005-04-16  3260  	dev++;
^1da177e4c3f41 Linus Torvalds 2005-04-16  3261  	return 0;
^1da177e4c3f41 Linus Torvalds 2005-04-16  3262  }
^1da177e4c3f41 Linus Torvalds 2005-04-16  3263

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

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