Messages in this thread | | | Date | Fri, 12 Nov 2021 16:27:20 +0800 | Subject | sound/pci/cmipci.c:3235:2: warning: Value stored to 'cm' is never read [clang-analyzer-deadcode.DeadStores] | From | 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
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