drivers/dma/mmp_tdma.c:650:10: warning: cast to smaller integer type 'enum mmp_tdma_type' from 'const void *'

From: kernel test robot
Date: Mon Nov 29 2021 - 03:03:06 EST

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Hi Lubomir,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: d58071a8a76d779eedab38033ae4c821c30295a5
commit: 9f3c14d4433b98c87f958128045539f297a2fa6d dmaengine: mmp_tdma: Allow building as a module
date: 10 months ago
config: riscv-randconfig-r042-20211111 (https://download.01.org/0day-ci/archive/20211129/202111291545.kyRNP20w-lkp@xxxxxxxxx/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 63ef0e17e28827eae53133b3467bdac7d9729318)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9f3c14d4433b98c87f958128045539f297a2fa6d
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 9f3c14d4433b98c87f958128045539f297a2fa6d
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash arch/riscv/kernel/ drivers/clocksource/ drivers/dma/ drivers/infiniband/core/ drivers/input/ drivers/misc/habanalabs/ drivers/mtd/nand/raw/ drivers/thermal/ fs/ceph/ fs/cifs/ fs/nfs/ kernel/

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

All warnings (new ones prefixed by >>):

>> drivers/dma/mmp_tdma.c:650:10: warning: cast to smaller integer type 'enum mmp_tdma_type' from 'const void *' [-Wvoid-pointer-to-enum-cast]
type = (enum mmp_tdma_type) of_id->data;
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.

vim +650 drivers/dma/mmp_tdma.c

f1a7757008b810 Zhangfei Gao 2012-09-03 636
463a1f8b3ceebe Bill Pemberton 2012-11-19 637 static int mmp_tdma_probe(struct platform_device *pdev)
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 638 {
f1a7757008b810 Zhangfei Gao 2012-09-03 639 enum mmp_tdma_type type;
f1a7757008b810 Zhangfei Gao 2012-09-03 640 const struct of_device_id *of_id;
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 641 struct mmp_tdma_device *tdev;
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 642 struct resource *iores;
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 643 int i, ret;
f1a7757008b810 Zhangfei Gao 2012-09-03 644 int irq = 0, irq_num = 0;
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 645 int chan_num = TDMA_CHANNEL_NUM;
1eed601a5b02a1 Qiao Zhou 2015-03-03 646 struct gen_pool *pool = NULL;
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 647
f1a7757008b810 Zhangfei Gao 2012-09-03 648 of_id = of_match_device(mmp_tdma_dt_ids, &pdev->dev);
f1a7757008b810 Zhangfei Gao 2012-09-03 649 if (of_id)
f1a7757008b810 Zhangfei Gao 2012-09-03 @650 type = (enum mmp_tdma_type) of_id->data;
f1a7757008b810 Zhangfei Gao 2012-09-03 651 else
f1a7757008b810 Zhangfei Gao 2012-09-03 652 type = platform_get_device_id(pdev)->driver_data;
f1a7757008b810 Zhangfei Gao 2012-09-03 653
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 654 /* always have couple channels */
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 655 tdev = devm_kzalloc(&pdev->dev, sizeof(*tdev), GFP_KERNEL);
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 656 if (!tdev)
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 657 return -ENOMEM;
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 658
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 659 tdev->dev = &pdev->dev;
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 660
f1a7757008b810 Zhangfei Gao 2012-09-03 661 for (i = 0; i < chan_num; i++) {
f1a7757008b810 Zhangfei Gao 2012-09-03 662 if (platform_get_irq(pdev, i) > 0)
f1a7757008b810 Zhangfei Gao 2012-09-03 663 irq_num++;
f1a7757008b810 Zhangfei Gao 2012-09-03 664 }
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 665
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 666 iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
7331205a9662a7 Thierry Reding 2013-01-21 667 tdev->base = devm_ioremap_resource(&pdev->dev, iores);
7331205a9662a7 Thierry Reding 2013-01-21 668 if (IS_ERR(tdev->base))
7331205a9662a7 Thierry Reding 2013-01-21 669 return PTR_ERR(tdev->base);
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 670
f1a7757008b810 Zhangfei Gao 2012-09-03 671 INIT_LIST_HEAD(&tdev->device.channels);
f1a7757008b810 Zhangfei Gao 2012-09-03 672
3b0f4a54f247b2 Nenghua Cao 2013-12-13 673 if (pdev->dev.of_node)
abdd4a7025282f Vladimir Zapolskiy 2015-06-30 674 pool = of_gen_pool_get(pdev->dev.of_node, "asram", 0);
3b0f4a54f247b2 Nenghua Cao 2013-12-13 675 else
3b0f4a54f247b2 Nenghua Cao 2013-12-13 676 pool = sram_get_gpool("asram");
3b0f4a54f247b2 Nenghua Cao 2013-12-13 677 if (!pool) {
3b0f4a54f247b2 Nenghua Cao 2013-12-13 678 dev_err(&pdev->dev, "asram pool not available\n");
3b0f4a54f247b2 Nenghua Cao 2013-12-13 679 return -ENOMEM;
3b0f4a54f247b2 Nenghua Cao 2013-12-13 680 }
3b0f4a54f247b2 Nenghua Cao 2013-12-13 681
f1a7757008b810 Zhangfei Gao 2012-09-03 682 if (irq_num != chan_num) {
f1a7757008b810 Zhangfei Gao 2012-09-03 683 irq = platform_get_irq(pdev, 0);
f1a7757008b810 Zhangfei Gao 2012-09-03 684 ret = devm_request_irq(&pdev->dev, irq,
c09a7ce668a666 Lubomir Rintel 2020-06-01 685 mmp_tdma_int_handler, IRQF_SHARED, "tdma", tdev);
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 686 if (ret)
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 687 return ret;
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 688 }
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 689
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 690 /* initialize channel parameters */
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 691 for (i = 0; i < chan_num; i++) {
f1a7757008b810 Zhangfei Gao 2012-09-03 692 irq = (irq_num != chan_num) ? 0 : platform_get_irq(pdev, i);
3b0f4a54f247b2 Nenghua Cao 2013-12-13 693 ret = mmp_tdma_chan_init(tdev, i, irq, type, pool);
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 694 if (ret)
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 695 return ret;
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 696 }
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 697
f1a7757008b810 Zhangfei Gao 2012-09-03 698 dma_cap_set(DMA_SLAVE, tdev->device.cap_mask);
f1a7757008b810 Zhangfei Gao 2012-09-03 699 dma_cap_set(DMA_CYCLIC, tdev->device.cap_mask);
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 700 tdev->device.dev = &pdev->dev;
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 701 tdev->device.device_alloc_chan_resources =
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 702 mmp_tdma_alloc_chan_resources;
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 703 tdev->device.device_free_chan_resources =
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 704 mmp_tdma_free_chan_resources;
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 705 tdev->device.device_prep_dma_cyclic = mmp_tdma_prep_dma_cyclic;
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 706 tdev->device.device_tx_status = mmp_tdma_tx_status;
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 707 tdev->device.device_issue_pending = mmp_tdma_issue_pending;
f43a6fd400ba66 Maxime Ripard 2014-11-17 708 tdev->device.device_config = mmp_tdma_config;
f43a6fd400ba66 Maxime Ripard 2014-11-17 709 tdev->device.device_pause = mmp_tdma_pause_chan;
f43a6fd400ba66 Maxime Ripard 2014-11-17 710 tdev->device.device_resume = mmp_tdma_resume_chan;
f43a6fd400ba66 Maxime Ripard 2014-11-17 711 tdev->device.device_terminate_all = mmp_tdma_terminate_all;
77a68e56aae141 Maxime Ripard 2015-07-20 712 tdev->device.copy_align = DMAENGINE_ALIGN_8_BYTES;
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 713
baed6b34ceea87 Lubomir Rintel 2020-04-19 714 tdev->device.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
baed6b34ceea87 Lubomir Rintel 2020-04-19 715 if (type == MMP_AUD_TDMA) {
baed6b34ceea87 Lubomir Rintel 2020-04-19 716 tdev->device.max_burst = SZ_128;
baed6b34ceea87 Lubomir Rintel 2020-04-19 717 tdev->device.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
baed6b34ceea87 Lubomir Rintel 2020-04-19 718 tdev->device.dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
baed6b34ceea87 Lubomir Rintel 2020-04-19 719 } else if (type == PXA910_SQU) {
baed6b34ceea87 Lubomir Rintel 2020-04-19 720 tdev->device.max_burst = SZ_32;
baed6b34ceea87 Lubomir Rintel 2020-04-19 721 }
baed6b34ceea87 Lubomir Rintel 2020-04-19 722 tdev->device.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
baed6b34ceea87 Lubomir Rintel 2020-04-19 723 tdev->device.descriptor_reuse = true;
baed6b34ceea87 Lubomir Rintel 2020-04-19 724
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 725 dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 726 platform_set_drvdata(pdev, tdev);
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 727
a5f99a95869e30 Huang Shijie 2018-08-06 728 ret = dmaenginem_async_device_register(&tdev->device);
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 729 if (ret) {
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 730 dev_err(tdev->device.dev, "unable to register\n");
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 731 return ret;
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 732 }
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 733
7dedc002c0ec67 Nenghua Cao 2014-01-20 734 if (pdev->dev.of_node) {
7dedc002c0ec67 Nenghua Cao 2014-01-20 735 ret = of_dma_controller_register(pdev->dev.of_node,
7dedc002c0ec67 Nenghua Cao 2014-01-20 736 mmp_tdma_xlate, tdev);
7dedc002c0ec67 Nenghua Cao 2014-01-20 737 if (ret) {
7dedc002c0ec67 Nenghua Cao 2014-01-20 738 dev_err(tdev->device.dev,
7dedc002c0ec67 Nenghua Cao 2014-01-20 739 "failed to register controller\n");
a5f99a95869e30 Huang Shijie 2018-08-06 740 return ret;
7dedc002c0ec67 Nenghua Cao 2014-01-20 741 }
7dedc002c0ec67 Nenghua Cao 2014-01-20 742 }
7dedc002c0ec67 Nenghua Cao 2014-01-20 743
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 744 dev_info(tdev->device.dev, "initialized\n");
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 745 return 0;
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 746 }
c6da0ba8dfc826 Zhangfei Gao 2012-06-15 747

:::::: The code at line 650 was first introduced by commit
:::::: f1a7757008b810217b2380d01b740244f21c09bd dmaengine: mmp_tdma: add dt support

:::::: TO: Zhangfei Gao <zhangfei.gao@xxxxxxxxxxx>
:::::: CC: Vinod Koul <vinod.koul@xxxxxxxxxxxxxxx>

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

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