Re: [PATCH] irqchip/stm32-exti: map direct event to irq parent

[kernel test robot <lkp@intel.com>]

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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@intel.com>

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@lists.01.org

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