[ti:ti-rt-linux-5.4.y 12712/12848] drivers/soc/ti/k3-ringacc.c:1479:24: sparse: sparse: incorrect type in return expression (different address spaces)

[ti:ti-rt-linux-5.4.y 12712/12848] drivers/soc/ti/k3-ringacc.c:1479:24: sparse: sparse: incorrect type in return expression (different address spaces)

[kernel test robot]

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tree:   git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git ti-rt-linux-5.4.y
head:   5408fe1faf9d469d0f9653c60c3e05098b7907b7
commit: c80de11c397fca6dc81ebad2af118cafad6800d7 [12712/12848] soc: ti: k3-ringacc: add AM64 DMA rings support.
config: arm64-randconfig-s032-20201209 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-179-ga00755aa-dirty
        git remote add ti git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git
        git fetch --no-tags ti ti-rt-linux-5.4.y
        git checkout c80de11c397fca6dc81ebad2af118cafad6800d7
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


"sparse warnings: (new ones prefixed by >>)"
>> drivers/soc/ti/k3-ringacc.c:1479:24: sparse: sparse: incorrect type in return expression (different address spaces) @@     expected struct k3_ringacc * @@     got void [noderef] <asn:2> *[assigned] base_rt @@
   drivers/soc/ti/k3-ringacc.c:1479:24: sparse:     expected struct k3_ringacc *
   drivers/soc/ti/k3-ringacc.c:1479:24: sparse:     got void [noderef] <asn:2> *[assigned] base_rt

vim +1479 drivers/soc/ti/k3-ringacc.c

  1454	
  1455	struct k3_ringacc *k3_ringacc_dmarings_init(struct platform_device *pdev,
  1456						    struct k3_ringacc_init_data *data)
  1457	{
  1458		struct device *dev = &pdev->dev;
  1459		struct k3_ringacc *ringacc;
  1460		void __iomem *base_rt;
  1461		struct resource *res;
  1462		int i;
  1463	
  1464		ringacc = devm_kzalloc(dev, sizeof(*ringacc), GFP_KERNEL);
  1465		if (!ringacc)
  1466			return ERR_PTR(-ENOMEM);
  1467	
  1468		ringacc->dev = dev;
  1469		ringacc->dma_rings = true;
  1470		ringacc->num_rings = data->num_rings;
  1471		ringacc->tisci = data->tisci;
  1472		ringacc->tisci_dev_id = data->tisci_dev_id;
  1473	
  1474		mutex_init(&ringacc->req_lock);
  1475	
  1476		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "ringrt");
  1477		base_rt = devm_ioremap_resource(dev, res);
  1478		if (IS_ERR(base_rt))
> 1479			return base_rt;
  1480	
  1481		ringacc->rings = devm_kzalloc(dev,
  1482					      sizeof(*ringacc->rings) *
  1483					      ringacc->num_rings * 2,
  1484					      GFP_KERNEL);
  1485		ringacc->rings_inuse = devm_kcalloc(dev,
  1486						    BITS_TO_LONGS(ringacc->num_rings),
  1487						    sizeof(unsigned long), GFP_KERNEL);
  1488	
  1489		if (!ringacc->rings || !ringacc->rings_inuse)
  1490			return ERR_PTR(-ENOMEM);
  1491	
  1492		for (i = 0; i < ringacc->num_rings; i++) {
  1493			struct k3_ring *ring = &ringacc->rings[i];
  1494	
  1495			ring->rt = base_rt + K3_DMARING_RT_REGS_STEP * i;
  1496			ring->parent = ringacc;
  1497			ring->ring_id = i;
  1498			ring->proxy_id = K3_RINGACC_PROXY_NOT_USED;
  1499	
  1500			ring = &ringacc->rings[ringacc->num_rings + i];
  1501			ring->rt = base_rt + K3_DMARING_RT_REGS_STEP * i +
  1502				   K3_DMARING_RT_REGS_REVERSE_OFS;
  1503			ring->parent = ringacc;
  1504			ring->ring_id = i;
  1505			ring->proxy_id = K3_RINGACC_PROXY_NOT_USED;
  1506			ring->flags = K3_RING_FLAG_REVERSE;
  1507		}
  1508	
  1509		ringacc->tisci_ring_ops = &ringacc->tisci->ops.rm_ring_ops;
  1510	
  1511		dev_info(dev, "Number of rings: %u\n", ringacc->num_rings);
  1512	
  1513		return ringacc;
  1514	}
  1515	EXPORT_SYMBOL_GPL(k3_ringacc_dmarings_init);
  1516	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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