Hi Alexandre, I love your patch! Perhaps something to improve: [auto build test WARNING on stm32/stm32-next] [also build test WARNING on soc/for-next v5.8-rc4 next-20200707] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Alexandre-Torgue/irqchip-stm32-exti-map-direct-event-to-irq-parent/20200706-161327 base: https://git.kernel.org/pub/scm/linux/kernel/git/atorgue/stm32.git stm32-next config: arm-randconfig-s031-20200707 (attached as .config) compiler: arm-linux-gnueabi-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: v0.6.2-31-gabbfd661-dirty # 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=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from include/linux/build_bug.h:5, from include/linux/bits.h:23, from include/linux/bitops.h:5, from drivers/irqchip/irq-stm32-exti.c:8: drivers/irqchip/irq-stm32-exti.c: In function 'stm32_exti_h_domain_alloc': drivers/irqchip/irq-stm32-exti.c:683:23: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] 683 | if (desc->irq_parent >= 0) { | ^~ include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var' 58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) | ^~~~ >> drivers/irqchip/irq-stm32-exti.c:683:2: note: in expansion of macro 'if' 683 | if (desc->irq_parent >= 0) { | ^~ drivers/irqchip/irq-stm32-exti.c:683:23: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] 683 | if (desc->irq_parent >= 0) { | ^~ include/linux/compiler.h:58:61: note: in definition of macro '__trace_if_var' 58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) | ^~~~ >> drivers/irqchip/irq-stm32-exti.c:683:2: note: in expansion of macro 'if' 683 | if (desc->irq_parent >= 0) { | ^~ drivers/irqchip/irq-stm32-exti.c:683:23: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] 683 | if (desc->irq_parent >= 0) { | ^~ include/linux/compiler.h:69:3: note: in definition of macro '__trace_if_value' 69 | (cond) ? \ | ^~~~ include/linux/compiler.h:56:28: note: in expansion of macro '__trace_if_var' 56 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) | ^~~~~~~~~~~~~~ >> drivers/irqchip/irq-stm32-exti.c:683:2: note: in expansion of macro 'if' 683 | if (desc->irq_parent >= 0) { | ^~ vim +/if +683 drivers/irqchip/irq-stm32-exti.c 659 660 static int stm32_exti_h_domain_alloc(struct irq_domain *dm, 661 unsigned int virq, 662 unsigned int nr_irqs, void *data) 663 { 664 struct stm32_exti_host_data *host_data = dm->host_data; 665 struct stm32_exti_chip_data *chip_data; 666 const struct stm32_desc_irq *desc; 667 struct irq_fwspec *fwspec = data; 668 struct irq_fwspec p_fwspec; 669 irq_hw_number_t hwirq; 670 int bank; 671 672 hwirq = fwspec->param[0]; 673 bank = hwirq / IRQS_PER_BANK; 674 chip_data = &host_data->chips_data[bank]; 675 676 677 desc = stm32_exti_get_desc(host_data->drv_data, hwirq); 678 if (!desc) 679 return -EINVAL; 680 681 irq_domain_set_hwirq_and_chip(dm, virq, hwirq, desc->chip, 682 chip_data); > 683 if (desc->irq_parent >= 0) { 684 p_fwspec.fwnode = dm->parent->fwnode; 685 p_fwspec.param_count = 3; 686 p_fwspec.param[0] = GIC_SPI; 687 p_fwspec.param[1] = desc->irq_parent; 688 p_fwspec.param[2] = IRQ_TYPE_LEVEL_HIGH; 689 690 return irq_domain_alloc_irqs_parent(dm, virq, 1, &p_fwspec); 691 } 692 693 return 0; 694 } 695 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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