[kbuild-all] [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)

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(a)intel.com&gt; "sparse warnings: (new ones prefixed by >>)" 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)) 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@lists.01.org