[cxl:preview 42/53] drivers/cxl/pci.c:437:7: warning: variable 'size' set but not used
From: kernel test robot
Date: Sat Jan 22 2022 - 07:22:55 EST
tree: https://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git preview
head: e675fabdbbcdb6e32dba688a20fb0bd42e0e2d5d
commit: 9f7f5289523a8cd7746b8aeca9350c87ecdc5747 [42/53] cxl/pci: Implement wait for media active
config: i386-randconfig-a013 (https://download.01.org/0day-ci/archive/20220122/202201222041.iNxUcO0N-lkp@xxxxxxxxx/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 7b3d30728816403d1fd73cc5082e9fb761262bce)
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/cxl/cxl.git/commit/?id=9f7f5289523a8cd7746b8aeca9350c87ecdc5747
git remote add cxl https://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git
git fetch --no-tags cxl preview
git checkout 9f7f5289523a8cd7746b8aeca9350c87ecdc5747
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/cxl/
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All warnings (new ones prefixed by >>):
>> drivers/cxl/pci.c:437:7: warning: variable 'size' set but not used [-Wunused-but-set-variable]
u64 size;
^
1 warning generated.
vim +/size +437 drivers/cxl/pci.c
419
420 /*
421 * Wait up to @mbox_ready_timeout for the device to report memory
422 * active.
423 */
424 static int wait_for_media_ready(struct cxl_dev_state *cxlds)
425 {
426 struct pci_dev *pdev = to_pci_dev(cxlds->dev);
427 int d = cxlds->cxl_dvsec;
428 bool active = false;
429 u64 md_status;
430 int rc, i;
431
432 rc = wait_for_valid(cxlds);
433 if (rc)
434 return rc;
435
436 for (i = mbox_ready_timeout; i; i--) {
> 437 u64 size;
438 u32 temp;
439 int rc;
440
441 rc = pci_read_config_dword(
442 pdev, d + CXL_DVSEC_RANGE_SIZE_HIGH(0), &temp);
443 if (rc)
444 return rc;
445 size = (u64)temp << 32;
446
447 rc = pci_read_config_dword(
448 pdev, d + CXL_DVSEC_RANGE_SIZE_LOW(0), &temp);
449 if (rc)
450 return rc;
451 size |= temp & CXL_DVSEC_MEM_SIZE_LOW_MASK;
452
453 active = FIELD_GET(CXL_DVSEC_MEM_ACTIVE, temp);
454 if (active)
455 break;
456 msleep(1);
457 }
458
459 if (!active) {
460 dev_err(&pdev->dev,
461 "timeout awaiting memory active after %d seconds\n",
462 mbox_ready_timeout);
463 return -ETIMEDOUT;
464 }
465
466 md_status = readq(cxlds->regs.memdev + CXLMDEV_STATUS_OFFSET);
467 if (!CXLMDEV_READY(md_status))
468 return -EIO;
469
470 return 0;
471 }
472
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx