tree: https://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra.git hte/for-next head: cedbe14082d169f4c1136c70c5170a76bd9a076a commit: a15a6cd5adac70f8ea9188b55ff0b2899cc34e0f [2/10] drivers: Add hardware timestamp engine (HTE) config: hexagon-allyesconfig (https://download.01.org/0day-ci/archive/20220504/202205040735.Qhz7Bads-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 363b3a645a1e30011cc8da624f13dac5fd915628) 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 # https://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra.git/commit/?id=a15a6cd5adac70f8ea9188b55ff0b2899cc34e0f git remote add arm-tegra https://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra.git git fetch --no-tags arm-tegra hte/for-next git checkout a15a6cd5adac70f8ea9188b55ff0b2899cc34e0f # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/hte/ 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/hte/hte.c:616:6: warning: variable 'ei' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized] if (ret < 0) ^~~~~~~ drivers/hte/hte.c:630:13: note: uninitialized use occurs here module_put(ei->gdev->owner); ^~ drivers/hte/hte.c:616:2: note: remove the 'if' if its condition is always false if (ret < 0) ^~~~~~~~~~~~ drivers/hte/hte.c:595:6: warning: variable 'ei' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized] if (!gdev->chip) { ^~~~~~~~~~~ drivers/hte/hte.c:630:13: note: uninitialized use occurs here module_put(ei->gdev->owner); ^~ drivers/hte/hte.c:595:2: note: remove the 'if' if its condition is always false if (!gdev->chip) { ^~~~~~~~~~~~~~~~~~ drivers/hte/hte.c:570:24: note: initialize the variable 'ei' to silence this warning struct hte_ts_info *ei; ^ = NULL 2 warnings generated. vim +616 drivers/hte/hte.c 551 552 /** 553 * hte_ts_get() - The function to initialize and obtain HTE desc. 554 * 555 * The function initializes the consumer provided HTE descriptor. If consumer 556 * has device tree node, index is used to parse the line id and other details. 557 * The function needs to be called before using any request APIs. 558 * 559 * @dev: HTE consumer/client device, used in case of parsing device tree node. 560 * @desc: Pre-allocated timestamp descriptor. 561 * @index: The index will be used as an index to parse line_id from the 562 * device tree node if node is present. 563 * 564 * Context: Holds mutex lock. 565 * Returns: Returns 0 on success or negative error code on failure. 566 */ 567 int hte_ts_get(struct device *dev, struct hte_ts_desc *desc, int index) 568 { 569 struct hte_device *gdev; 570 struct hte_ts_info *ei; 571 const struct fwnode_handle *fwnode; 572 struct of_phandle_args args; 573 u32 xlated_id; 574 int ret; 575 bool free_name; 576 577 if (!desc) 578 return -EINVAL; 579 580 fwnode = dev ? dev_fwnode(dev) : NULL; 581 582 if (is_of_node(fwnode)) 583 gdev = hte_of_get_dev(dev, desc, index, &args, &free_name); 584 else 585 gdev = hte_get_dev(desc); 586 587 if (IS_ERR(gdev)) { 588 pr_err("%s() no hte dev found\n", __func__); 589 return PTR_ERR(gdev); 590 } 591 592 if (!try_module_get(gdev->owner)) 593 return -ENODEV; 594 595 if (!gdev->chip) { 596 pr_err("%s(): requested id does not have provider\n", 597 __func__); 598 ret = -ENODEV; 599 goto out; 600 } 601 602 if (is_of_node(fwnode)) { 603 if (!gdev->chip->xlate_of) 604 ret = -EINVAL; 605 else 606 ret = gdev->chip->xlate_of(gdev->chip, &args, 607 desc, &xlated_id); 608 } else { 609 if (!gdev->chip->xlate_plat) 610 ret = -EINVAL; 611 else 612 ret = gdev->chip->xlate_plat(gdev->chip, desc, 613 &xlated_id); 614 } 615 > 616 if (ret < 0) 617 goto out; 618 619 ei = &gdev->ei[xlated_id]; 620 621 ret = hte_bind_ts_info_locked(ei, desc, xlated_id); 622 if (ret) 623 goto out; 624 625 ei->free_attr_name = free_name; 626 627 return 0; 628 629 out: 630 module_put(ei->gdev->owner); 631 632 return ret; 633 } 634 EXPORT_SYMBOL_GPL(hte_ts_get); 635 -- 0-DAY CI Kernel Test Service https://01.org/lkp
