[arm:cex7 10/41] drivers/pci/controller/mobiveil/pcie-mobiveil.c:44:49: sparse: sparse: incorrect type in return expression (different address spaces)

tree:   git://git.armlinux.org.uk/~rmk/linux-arm.git cex7
head:   9de8c9294924dc903e79ca03162cbd208a834330
commit: 2729e9ee9e99b04171a1cddddcd3027dd350dbde [10/41] PCI: mobiveil: Refactor Mobiveil PCIe Host Bridge IP driver
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-rc1-42-g38eda53-dirty
        git checkout 2729e9ee9e99b04171a1cddddcd3027dd350dbde
        make ARCH=x86_64 allmodconfig
        make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <redacted>


sparse warnings: (new ones prefixed by >>)

quoted

drivers/pci/controller/mobiveil/pcie-mobiveil.c:44:49: sparse: sparse: incorrect type in return expression (different address spaces) @@    expected void * @@    got void [noderef] <asvoid * @@
drivers/pci/controller/mobiveil/pcie-mobiveil.c:44:49: sparse:    expected void *
drivers/pci/controller/mobiveil/pcie-mobiveil.c:44:49: sparse:    got void [noderef] <asn:2> *

   drivers/pci/controller/mobiveil/pcie-mobiveil.c:48:41: sparse: sparse: incorrect type in return expression (different address spaces) @@    expected void * @@    got void [noderef] <asvoid * @@
   drivers/pci/controller/mobiveil/pcie-mobiveil.c:48:41: sparse:    expected void *
   drivers/pci/controller/mobiveil/pcie-mobiveil.c:48:41: sparse:    got void [noderef] <asn:2> *

quoted

drivers/pci/controller/mobiveil/pcie-mobiveil.c:106:34: sparse: sparse: incorrect type in argument 1 (different address spaces) @@    expected void [noderef] <asn:2> *addr @@    got oderef] <asn:2> *addr @@
drivers/pci/controller/mobiveil/pcie-mobiveil.c:106:34: sparse:    expected void [noderef] <asn:2> *addr
drivers/pci/controller/mobiveil/pcie-mobiveil.c:106:34: sparse:    got void *[assigned] addr

   drivers/pci/controller/mobiveil/pcie-mobiveil.c:120:35: sparse: sparse: incorrect type in argument 1 (different address spaces) @@    expected void [noderef] <asn:2> *addr @@    got oderef] <asn:2> *addr @@
   drivers/pci/controller/mobiveil/pcie-mobiveil.c:120:35: sparse:    expected void [noderef] <asn:2> *addr
   drivers/pci/controller/mobiveil/pcie-mobiveil.c:120:35: sparse:    got void *[assigned] addr

vim +44 drivers/pci/controller/mobiveil/pcie-mobiveil.c

    38	
    39	static void *mobiveil_pcie_comp_addr(struct mobiveil_pcie *pcie, u32 off)
    40	{
    41		if (off < PAGED_ADDR_BNDRY) {
    42			/* For directly accessed registers, clear the pg_sel field */
    43			mobiveil_pcie_sel_page(pcie, 0);
  > 44			return pcie->csr_axi_slave_base + off;
    45		}
    46	
    47		mobiveil_pcie_sel_page(pcie, OFFSET_TO_PAGE_IDX(off));
    48		return pcie->csr_axi_slave_base + OFFSET_TO_PAGE_ADDR(off);
    49	}
    50	
    51	static int mobiveil_pcie_read(void __iomem *addr, int size, u32 *val)
    52	{
    53		if ((uintptr_t)addr & (size - 1)) {
    54			*val = 0;
    55			return PCIBIOS_BAD_REGISTER_NUMBER;
    56		}
    57	
    58		switch (size) {
    59		case 4:
    60			*val = readl(addr);
    61			break;
    62		case 2:
    63			*val = readw(addr);
    64			break;
    65		case 1:
    66			*val = readb(addr);
    67			break;
    68		default:
    69			*val = 0;
    70			return PCIBIOS_BAD_REGISTER_NUMBER;
    71		}
    72	
    73		return PCIBIOS_SUCCESSFUL;
    74	}
    75	
    76	static int mobiveil_pcie_write(void __iomem *addr, int size, u32 val)
    77	{
    78		if ((uintptr_t)addr & (size - 1))
    79			return PCIBIOS_BAD_REGISTER_NUMBER;
    80	
    81		switch (size) {
    82		case 4:
    83			writel(val, addr);
    84			break;
    85		case 2:
    86			writew(val, addr);
    87			break;
    88		case 1:
    89			writeb(val, addr);
    90			break;
    91		default:
    92			return PCIBIOS_BAD_REGISTER_NUMBER;
    93		}
    94	
    95		return PCIBIOS_SUCCESSFUL;
    96	}
    97	
    98	u32 csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size)
    99	{
   100		void *addr;
   101		u32 val;
   102		int ret;
   103	
   104		addr = mobiveil_pcie_comp_addr(pcie, off);
   105	
 > 106		ret = mobiveil_pcie_read(addr, size, &val);
   107		if (ret)
   108			dev_err(&pcie->pdev->dev, "read CSR address failed\n");
   109	
   110		return val;
   111	}
   112	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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