[jgunthorpe:for-nicolin 18/28] drivers/iommu/ipmmu-vmsa.c:599:22: warning: unused variable 'i'

[jgunthorpe:for-nicolin 18/28] drivers/iommu/ipmmu-vmsa.c:599:22: warning: unused variable 'i'

[kernel test robot]

tree:   https://github.com/jgunthorpe/linux for-nicolin
head:   88dcad1e4861f296ede23d6aa870ccedb3033a8b
commit: 6592e9df15aadae830e2a3bfd156879310d16666 [18/28] iommu/ipmmu-vmsa: Implement ipmmu_domain_test_device
config: x86_64-buildonly-randconfig-002-20250930 (https://download.01.org/0day-ci/archive/20250930/202509301444.YSicwMA6-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250930/202509301444.YSicwMA6-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/202509301444.YSicwMA6-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/iommu/ipmmu-vmsa.c: In function 'ipmmu_domain_test_device':
>> drivers/iommu/ipmmu-vmsa.c:599:22: warning: unused variable 'i' [-Wunused-variable]
     599 |         unsigned int i;
         |                      ^
>> drivers/iommu/ipmmu-vmsa.c:596:30: warning: unused variable 'fwspec' [-Wunused-variable]
     596 |         struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
         |                              ^~~~~~


vim +/i +599 drivers/iommu/ipmmu-vmsa.c

d25a2a16f0889de Laurent Pinchart 2014-04-02  591  
6592e9df15aadae Nicolin Chen     2025-09-25  592  static int ipmmu_domain_test_device(struct iommu_domain *io_domain,
6592e9df15aadae Nicolin Chen     2025-09-25  593  				    struct device *dev, ioasid_t pasid,
6592e9df15aadae Nicolin Chen     2025-09-25  594  				    struct iommu_domain *old)
d25a2a16f0889de Laurent Pinchart 2014-04-02  595  {
df90365580623b5 Joerg Roedel     2018-11-29 @596  	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
e4efe4a9a2ace65 Robin Murphy     2017-10-13  597  	struct ipmmu_vmsa_device *mmu = to_ipmmu(dev);
5914c5fdde92660 Joerg Roedel     2015-03-26  598  	struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);
a166d31ee56e8fc Laurent Pinchart 2014-07-24 @599  	unsigned int i;
d25a2a16f0889de Laurent Pinchart 2014-04-02  600  
e4efe4a9a2ace65 Robin Murphy     2017-10-13  601  	if (!mmu) {
6592e9df15aadae Nicolin Chen     2025-09-25  602  		dev_dbg(dev, "Cannot attach to IPMMU\n");
d25a2a16f0889de Laurent Pinchart 2014-04-02  603  		return -ENXIO;
d25a2a16f0889de Laurent Pinchart 2014-04-02  604  	}
d25a2a16f0889de Laurent Pinchart 2014-04-02  605  
6592e9df15aadae Nicolin Chen     2025-09-25  606  	scoped_guard(mutex, &domain->mutex) {
6592e9df15aadae Nicolin Chen     2025-09-25  607  		/*
6592e9df15aadae Nicolin Chen     2025-09-25  608  		 * Something is wrong, we can't attach two devices using different
6592e9df15aadae Nicolin Chen     2025-09-25  609  		 * IOMMUs to the same domain.
6592e9df15aadae Nicolin Chen     2025-09-25  610  		 */
6592e9df15aadae Nicolin Chen     2025-09-25  611  		if (domain->mmu && domain->mmu != mmu)
6592e9df15aadae Nicolin Chen     2025-09-25  612  			return -EINVAL;
6592e9df15aadae Nicolin Chen     2025-09-25  613  	}
6592e9df15aadae Nicolin Chen     2025-09-25  614  
6592e9df15aadae Nicolin Chen     2025-09-25  615  	return 0;
6592e9df15aadae Nicolin Chen     2025-09-25  616  }
6592e9df15aadae Nicolin Chen     2025-09-25  617  

:::::: The code at line 599 was first introduced by commit
:::::: a166d31ee56e8fc56ce2497d8de9da5359f4ee41 iommu/ipmmu-vmsa: Support multiple micro TLBs per device

:::::: TO: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
:::::: CC: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

-- 
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https://github.com/intel/lkp-tests/wiki