drivers/gpu/drm/imx/ipuv3/imx-ldb.c:659:39: warning: '_sel' directive writing 4 bytes into a region of size between 3 and 13

From: kernel test robot
Date: Fri Nov 03 2023 - 13:20:28 EST

Next message: kernel test robot: "drivers/i2c/busses/i2c-tegra.c:297: warning: Function parameter or member 'dma_dev' not described in 'tegra_i2c_dev'"
Previous message: Cindy Lu: "[RFC v1 8/8] iommu: expose the function iommu_device_use_default_domain"
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Hi Lucas,

First bad commit (maybe != root cause):

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 8f6f76a6a29f36d2f3e4510d0bde5046672f6924
commit: 4b6cb2b67da883bc5095ee6d77f951f1cd7a1c24 drm/imx: move IPUv3 driver into separate subdirectory
date: 11 months ago
config: sparc-allmodconfig (https://download.01.org/0day-ci/archive/20231104/202311040118.DpgJp95C-lkp@xxxxxxxxx/config)
compiler: sparc64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231104/202311040118.DpgJp95C-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311040118.DpgJp95C-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

drivers/gpu/drm/imx/ipuv3/imx-ldb.c: In function 'imx_ldb_probe':
>> drivers/gpu/drm/imx/ipuv3/imx-ldb.c:659:39: warning: '_sel' directive writing 4 bytes into a region of size between 3 and 13 [-Wformat-overflow=]
659 | sprintf(clkname, "di%d_sel", i);
| ^~~~
drivers/gpu/drm/imx/ipuv3/imx-ldb.c:659:17: note: 'sprintf' output between 8 and 18 bytes into a destination of size 16
659 | sprintf(clkname, "di%d_sel", i);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/_sel +659 drivers/gpu/drm/imx/ipuv3/imx-ldb.c

8767f4711b2b74 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2020-12-10 615
8767f4711b2b74 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2020-12-10 616 static int imx_ldb_probe(struct platform_device *pdev)
8767f4711b2b74 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2020-12-10 617 {
8767f4711b2b74 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2020-12-10 618 struct device *dev = &pdev->dev;
17b5001b5143e3 drivers/staging/imx-drm/imx-ldb.c Russell King 2013-11-03 619 struct device_node *np = dev->of_node;
8767f4711b2b74 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2020-12-10 620 const struct of_device_id *of_id = of_match_device(imx_ldb_dt_ids, dev);
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 621 struct device_node *child;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 622 struct imx_ldb *imx_ldb;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 623 int dual;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 624 int ret;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 625 int i;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 626
8767f4711b2b74 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2020-12-10 627 imx_ldb = devm_kzalloc(dev, sizeof(*imx_ldb), GFP_KERNEL);
8767f4711b2b74 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2020-12-10 628 if (!imx_ldb)
8767f4711b2b74 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2020-12-10 629 return -ENOMEM;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 630
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 631 imx_ldb->regmap = syscon_regmap_lookup_by_phandle(np, "gpr");
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 632 if (IS_ERR(imx_ldb->regmap)) {
17b5001b5143e3 drivers/staging/imx-drm/imx-ldb.c Russell King 2013-11-03 633 dev_err(dev, "failed to get parent regmap\n");
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 634 return PTR_ERR(imx_ldb->regmap);
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 635 }
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 636
b58262396fabd4 drivers/gpu/drm/imx/imx-ldb.c Lucas Stach 2018-04-11 637 /* disable LDB by resetting the control register to POR default */
b58262396fabd4 drivers/gpu/drm/imx/imx-ldb.c Lucas Stach 2018-04-11 638 regmap_write(imx_ldb->regmap, IOMUXC_GPR2, 0);
b58262396fabd4 drivers/gpu/drm/imx/imx-ldb.c Lucas Stach 2018-04-11 639
17b5001b5143e3 drivers/staging/imx-drm/imx-ldb.c Russell King 2013-11-03 640 imx_ldb->dev = dev;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 641
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 642 if (of_id)
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 643 imx_ldb->lvds_mux = of_id->data;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 644
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 645 dual = of_property_read_bool(np, "fsl,dual-channel");
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 646 if (dual)
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 647 imx_ldb->ldb_ctrl |= LDB_SPLIT_MODE_EN;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 648
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 649 /*
4599934de2cd1c drivers/staging/imx-drm/imx-ldb.c Masanari Iida 2013-07-24 650 * There are three different possible clock mux configurations:
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 651 * i.MX53: ipu1_di0_sel, ipu1_di1_sel
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 652 * i.MX6q: ipu1_di0_sel, ipu1_di1_sel, ipu2_di0_sel, ipu2_di1_sel
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 653 * i.MX6dl: ipu1_di0_sel, ipu1_di1_sel, lcdif_sel
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 654 * Map them all to di0_sel...di3_sel.
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 655 */
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 656 for (i = 0; i < 4; i++) {
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 657 char clkname[16];
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 658
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 @659 sprintf(clkname, "di%d_sel", i);
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 660 imx_ldb->clk_sel[i] = devm_clk_get(imx_ldb->dev, clkname);
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 661 if (IS_ERR(imx_ldb->clk_sel[i])) {
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 662 ret = PTR_ERR(imx_ldb->clk_sel[i]);
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 663 imx_ldb->clk_sel[i] = NULL;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 664 break;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 665 }
3973aff0658530 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2014-11-26 666
3973aff0658530 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2014-11-26 667 imx_ldb->clk_parent[i] = clk_get_parent(imx_ldb->clk_sel[i]);
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 668 }
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 669 if (i == 0)
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 670 return ret;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 671
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 672 for_each_child_of_node(np, child) {
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 673 struct imx_ldb_channel *channel;
032003c5cd744e drivers/gpu/drm/imx/imx-ldb.c Liu Ying 2016-07-08 674 int bus_format;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 675
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 676 ret = of_property_read_u32(child, "reg", &i);
aa3312012f103f drivers/gpu/drm/imx/imx-ldb.c Julia Lawall 2019-01-13 677 if (ret || i < 0 || i > 1) {
aa3312012f103f drivers/gpu/drm/imx/imx-ldb.c Julia Lawall 2019-01-13 678 ret = -EINVAL;
aa3312012f103f drivers/gpu/drm/imx/imx-ldb.c Julia Lawall 2019-01-13 679 goto free_child;
aa3312012f103f drivers/gpu/drm/imx/imx-ldb.c Julia Lawall 2019-01-13 680 }
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 681
c80d673b91a6c8 drivers/gpu/drm/imx/imx-ldb.c Lucas Stach 2018-04-11 682 if (!of_device_is_available(child))
c80d673b91a6c8 drivers/gpu/drm/imx/imx-ldb.c Lucas Stach 2018-04-11 683 continue;
c80d673b91a6c8 drivers/gpu/drm/imx/imx-ldb.c Lucas Stach 2018-04-11 684
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 685 if (dual && i > 0) {
17b5001b5143e3 drivers/staging/imx-drm/imx-ldb.c Russell King 2013-11-03 686 dev_warn(dev, "dual-channel mode, ignoring second output\n");
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 687 continue;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 688 }
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 689
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 690 channel = &imx_ldb->channel[i];
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 691 channel->ldb = imx_ldb;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 692 channel->chno = i;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 693
751e2676ee9272 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2014-03-06 694 /*
751e2676ee9272 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2014-03-06 695 * The output port is port@4 with an external 4-port mux or
751e2676ee9272 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2014-03-06 696 * port@2 with the internal 2-port mux.
751e2676ee9272 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2014-03-06 697 */
ebc9446135671b drivers/gpu/drm/imx/imx-ldb.c Rob Herring 2017-03-29 698 ret = drm_of_find_panel_or_bridge(child,
ebc9446135671b drivers/gpu/drm/imx/imx-ldb.c Rob Herring 2017-03-29 699 imx_ldb->lvds_mux ? 4 : 2, 0,
ebc9446135671b drivers/gpu/drm/imx/imx-ldb.c Rob Herring 2017-03-29 700 &channel->panel, &channel->bridge);
e36aecba54bf24 drivers/gpu/drm/imx/imx-ldb.c Leonard Crestez 2017-05-10 701 if (ret && ret != -ENODEV)
aa3312012f103f drivers/gpu/drm/imx/imx-ldb.c Julia Lawall 2019-01-13 702 goto free_child;
a6d206e28abe46 drivers/gpu/drm/imx/imx-ldb.c Steve Longerbeam 2016-04-27 703
dc80d7038883fe drivers/gpu/drm/imx/imx-ldb.c Peter Senna Tschudin 2016-08-05 704 /* panel ddc only if there is no bridge */
dc80d7038883fe drivers/gpu/drm/imx/imx-ldb.c Peter Senna Tschudin 2016-08-05 705 if (!channel->bridge) {
dc80d7038883fe drivers/gpu/drm/imx/imx-ldb.c Peter Senna Tschudin 2016-08-05 706 ret = imx_ldb_panel_ddc(dev, channel, child);
dc80d7038883fe drivers/gpu/drm/imx/imx-ldb.c Peter Senna Tschudin 2016-08-05 707 if (ret)
aa3312012f103f drivers/gpu/drm/imx/imx-ldb.c Julia Lawall 2019-01-13 708 goto free_child;
a6d206e28abe46 drivers/gpu/drm/imx/imx-ldb.c Steve Longerbeam 2016-04-27 709 }
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 710
032003c5cd744e drivers/gpu/drm/imx/imx-ldb.c Liu Ying 2016-07-08 711 bus_format = of_get_bus_format(dev, child);
032003c5cd744e drivers/gpu/drm/imx/imx-ldb.c Liu Ying 2016-07-08 712 if (bus_format == -EINVAL) {
5e501ed7253b36 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2014-12-02 713 /*
5e501ed7253b36 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2014-12-02 714 * If no bus format was specified in the device tree,
5e501ed7253b36 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2014-12-02 715 * we can still get it from the connected panel later.
5e501ed7253b36 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2014-12-02 716 */
5e501ed7253b36 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2014-12-02 717 if (channel->panel && channel->panel->funcs &&
5e501ed7253b36 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2014-12-02 718 channel->panel->funcs->get_modes)
032003c5cd744e drivers/gpu/drm/imx/imx-ldb.c Liu Ying 2016-07-08 719 bus_format = 0;
5e501ed7253b36 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2014-12-02 720 }
032003c5cd744e drivers/gpu/drm/imx/imx-ldb.c Liu Ying 2016-07-08 721 if (bus_format < 0) {
5e501ed7253b36 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2014-12-02 722 dev_err(dev, "could not determine data mapping: %d\n",
032003c5cd744e drivers/gpu/drm/imx/imx-ldb.c Liu Ying 2016-07-08 723 bus_format);
aa3312012f103f drivers/gpu/drm/imx/imx-ldb.c Julia Lawall 2019-01-13 724 ret = bus_format;
aa3312012f103f drivers/gpu/drm/imx/imx-ldb.c Julia Lawall 2019-01-13 725 goto free_child;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 726 }
49f98bc4d44a4e drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2016-07-06 727 channel->bus_format = bus_format;
aa3312012f103f drivers/gpu/drm/imx/imx-ldb.c Julia Lawall 2019-01-13 728 channel->child = child;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 729 }
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 730
8767f4711b2b74 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2020-12-10 731 platform_set_drvdata(pdev, imx_ldb);
8767f4711b2b74 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2020-12-10 732
8767f4711b2b74 drivers/gpu/drm/imx/imx-ldb.c Philipp Zabel 2020-12-10 733 return component_add(&pdev->dev, &imx_ldb_ops);
aa3312012f103f drivers/gpu/drm/imx/imx-ldb.c Julia Lawall 2019-01-13 734
aa3312012f103f drivers/gpu/drm/imx/imx-ldb.c Julia Lawall 2019-01-13 735 free_child:
aa3312012f103f drivers/gpu/drm/imx/imx-ldb.c Julia Lawall 2019-01-13 736 of_node_put(child);
aa3312012f103f drivers/gpu/drm/imx/imx-ldb.c Julia Lawall 2019-01-13 737 return ret;
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 738 }
ac4c1a9b330059 drivers/staging/imx-drm/imx-ldb.c Sascha Hauer 2013-06-18 739

:::::: The code at line 659 was first introduced by commit
:::::: ac4c1a9b33005969b05de0f13ec90ec426a76769 staging: drm/imx: Add LDB support

:::::: TO: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
:::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

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