Re: [PATCH v3 1/3] iommu: Sort out domain user data

[kernel test robot <lkp@intel.com>]

Hi Nicolin,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 5e9f822c9c683ae884fa5e71df41d1647b2876c6]

url:    https://github.com/intel-lab-lkp/linux/commits/Nicolin-Chen/iommu-Sort-out-domain-user-data/20250304-045529
base:   5e9f822c9c683ae884fa5e71df41d1647b2876c6
patch link:    https://lore.kernel.org/r/74a3bf91b52563faaf7ef7de065931e4df47e63f.1741034886.git.nicolinc%40nvidia.com
patch subject: [PATCH v3 1/3] iommu: Sort out domain user data
config: csky-randconfig-r111-20250305 (https://download.01.org/0day-ci/archive/20250306/202503060130.fkBIRmys-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 14.2.0
reproduce: (https://download.01.org/0day-ci/archive/20250306/202503060130.fkBIRmys-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202503060130.fkBIRmys-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/iommu/iommu.c:2040:9: sparse: sparse: statement expected after case label
   drivers/iommu/iommu.c: note: in included file (through include/linux/mutex.h, include/linux/notifier.h, include/linux/clk.h, ...):
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true
   include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true

vim +2040 drivers/iommu/iommu.c

  2026	
  2027	void iommu_domain_free(struct iommu_domain *domain)
  2028	{
  2029		switch (domain->cookie_type) {
  2030		case IOMMU_COOKIE_DMA_IOVA:
  2031			iommu_put_dma_cookie(domain);
  2032			break;
  2033		case IOMMU_COOKIE_DMA_MSI:
  2034			iommu_put_msi_cookie(domain);
  2035			break;
  2036		case IOMMU_COOKIE_SVA:
  2037			mmdrop(domain->mm);
  2038			break;
  2039		default:
> 2040		}
  2041		if (domain->ops->free)
  2042			domain->ops->free(domain);
  2043	}
  2044	EXPORT_SYMBOL_GPL(iommu_domain_free);
  2045	

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