Re: [PATCH 04/13] a2b: add AD24xx I2C interface driver

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Hi Alvin,

kernel test robot noticed the following build errors:

[auto build test ERROR on c75962170e49f24399141276ae119e6a879f36dc]

url:    https://github.com/intel-lab-lkp/linux/commits/Alvin-ipraga/a2b-add-A2B-driver-core/20240517-211849
base:   c75962170e49f24399141276ae119e6a879f36dc
patch link:    https://lore.kernel.org/r/20240517-a2b-v1-4-b8647554c67b%40bang-olufsen.dk
patch subject: [PATCH 04/13] a2b: add AD24xx I2C interface driver
config: i386-allmodconfig (https://download.01.org/0day-ci/archive/20240518/202405182210.oMSzcs2I-lkp@xxxxxxxxx/config)
compiler: gcc-13 (Ubuntu 13.2.0-4ubuntu3) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240518/202405182210.oMSzcs2I-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/202405182210.oMSzcs2I-lkp@xxxxxxxxx/

All error/warnings (new ones prefixed by >>):

   drivers/a2b/ad24xx-i2c.c: In function 'ad24xx_i2c_irq_handler':
>> drivers/a2b/ad24xx-i2c.c:272:17: error: implicit declaration of function 'handle_nested_irq' [-Werror=implicit-function-declaration]
     272 |                 handle_nested_irq(virq);
         |                 ^~~~~~~~~~~~~~~~~
   drivers/a2b/ad24xx-i2c.c: In function 'ad24xx_i2c_irq_enable':
>> drivers/a2b/ad24xx-i2c.c:281:33: error: implicit declaration of function 'irq_data_get_irq_chip_data'; did you mean 'irq_domain_get_irq_data'? [-Werror=implicit-function-declaration]
     281 |         struct ad24xx_i2c *ad = irq_data_get_irq_chip_data(irq_data);
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~
         |                                 irq_domain_get_irq_data
>> drivers/a2b/ad24xx-i2c.c:281:33: warning: initialization of 'struct ad24xx_i2c *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
>> drivers/a2b/ad24xx-i2c.c:282:41: error: invalid use of undefined type 'struct irq_data'
     282 |         irq_hw_number_t hwirq = irq_data->hwirq;
         |                                         ^~
   drivers/a2b/ad24xx-i2c.c: In function 'ad24xx_i2c_irq_disable':
   drivers/a2b/ad24xx-i2c.c:289:33: warning: initialization of 'struct ad24xx_i2c *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
     289 |         struct ad24xx_i2c *ad = irq_data_get_irq_chip_data(irq_data);
         |                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/a2b/ad24xx-i2c.c:290:41: error: invalid use of undefined type 'struct irq_data'
     290 |         irq_hw_number_t hwirq = irq_data->hwirq;
         |                                         ^~
   drivers/a2b/ad24xx-i2c.c: At top level:
>> drivers/a2b/ad24xx-i2c.c:295:21: error: variable 'ad24xx_i2c_irq_chip' has initializer but incomplete type
     295 | static const struct irq_chip ad24xx_i2c_irq_chip = {
         |                     ^~~~~~~~
>> drivers/a2b/ad24xx-i2c.c:296:10: error: 'const struct irq_chip' has no member named 'name'
     296 |         .name = "ad24xx-i2c",
         |          ^~~~
>> drivers/a2b/ad24xx-i2c.c:296:17: warning: excess elements in struct initializer
     296 |         .name = "ad24xx-i2c",
         |                 ^~~~~~~~~~~~
   drivers/a2b/ad24xx-i2c.c:296:17: note: (near initialization for 'ad24xx_i2c_irq_chip')
>> drivers/a2b/ad24xx-i2c.c:297:10: error: 'const struct irq_chip' has no member named 'irq_enable'
     297 |         .irq_enable = ad24xx_i2c_irq_enable,
         |          ^~~~~~~~~~
   drivers/a2b/ad24xx-i2c.c:297:23: warning: excess elements in struct initializer
     297 |         .irq_enable = ad24xx_i2c_irq_enable,
         |                       ^~~~~~~~~~~~~~~~~~~~~
   drivers/a2b/ad24xx-i2c.c:297:23: note: (near initialization for 'ad24xx_i2c_irq_chip')
>> drivers/a2b/ad24xx-i2c.c:298:10: error: 'const struct irq_chip' has no member named 'irq_disable'
     298 |         .irq_disable = ad24xx_i2c_irq_disable,
         |          ^~~~~~~~~~~
   drivers/a2b/ad24xx-i2c.c:298:24: warning: excess elements in struct initializer
     298 |         .irq_disable = ad24xx_i2c_irq_disable,
         |                        ^~~~~~~~~~~~~~~~~~~~~~
   drivers/a2b/ad24xx-i2c.c:298:24: note: (near initialization for 'ad24xx_i2c_irq_chip')
   drivers/a2b/ad24xx-i2c.c: In function 'ad24xx_i2c_irqdomain_map':
>> drivers/a2b/ad24xx-i2c.c:304:9: error: implicit declaration of function 'irq_set_chip_data' [-Werror=implicit-function-declaration]
     304 |         irq_set_chip_data(irq, irqdomain->host_data);
         |         ^~~~~~~~~~~~~~~~~
>> drivers/a2b/ad24xx-i2c.c:305:9: error: implicit declaration of function 'irq_set_chip_and_handler' [-Werror=implicit-function-declaration]
     305 |         irq_set_chip_and_handler(irq, &ad24xx_i2c_irq_chip, handle_simple_irq);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/a2b/ad24xx-i2c.c:305:61: error: 'handle_simple_irq' undeclared (first use in this function)
     305 |         irq_set_chip_and_handler(irq, &ad24xx_i2c_irq_chip, handle_simple_irq);
         |                                                             ^~~~~~~~~~~~~~~~~
   drivers/a2b/ad24xx-i2c.c:305:61: note: each undeclared identifier is reported only once for each function it appears in
>> drivers/a2b/ad24xx-i2c.c:306:9: error: implicit declaration of function 'irq_set_nested_thread' [-Werror=implicit-function-declaration]
     306 |         irq_set_nested_thread(irq, 1);
         |         ^~~~~~~~~~~~~~~~~~~~~
>> drivers/a2b/ad24xx-i2c.c:307:9: error: implicit declaration of function 'irq_set_noprobe' [-Werror=implicit-function-declaration]
     307 |         irq_set_noprobe(irq);
         |         ^~~~~~~~~~~~~~~
   drivers/a2b/ad24xx-i2c.c: At top level:
>> drivers/a2b/ad24xx-i2c.c:295:30: error: storage size of 'ad24xx_i2c_irq_chip' isn't known
     295 | static const struct irq_chip ad24xx_i2c_irq_chip = {
         |                              ^~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/handle_nested_irq +272 drivers/a2b/ad24xx-i2c.c

   218	
   219	static irqreturn_t ad24xx_i2c_irq_handler(int irq, void *data)
   220	{
   221		struct ad24xx_i2c *ad = data;
   222		bool handled = false;
   223		unsigned long hwirq;
   224		unsigned int val;
   225		unsigned int virq;
   226		int ret;
   227	
   228		/*
   229		 * The transceiver asserts the IRQ line as long as there are pending
   230		 * interrupts. Process them all here so that the interrupt can be
   231		 * configured with an edge trigger.
   232		 */
   233		while (true) {
   234			mutex_lock(&ad->mutex);
   235			ret = regmap_read(ad->base_regmap, A2B_INTSRC, &val);
   236			mutex_unlock(&ad->mutex);
   237			if (ret) {
   238				dev_err_ratelimited(
   239					ad->dev,
   240					"failed to read interrupt source: %d\n", ret);
   241				break;
   242			}
   243	
   244			if (val & A2B_INTSRC_MSTINT_MASK)
   245				hwirq = 0;
   246			else if (val & A2B_INTSRC_SLVINT_MASK)
   247				hwirq = (val & A2B_INTSRC_INODE_MASK) + 1;
   248			else
   249				break;
   250	
   251			/*
   252			 * Pending interrupts are only cleared when reading the
   253			 * interrupt type. Normally this is done in the corresponding
   254			 * node's interrupt handler, but in case the interrupt is
   255			 * disabled, it has to be read here.
   256			 */
   257			if (!(BIT(hwirq) & ad->irqs_enabled)) {
   258				ret = ad24xx_i2c_get_inttype(&ad->a2b_bus, &val);
   259				if (ret)
   260					dev_err_ratelimited(
   261						ad->dev,
   262						"failed to read interrupt type: %d\n",
   263						ret);
   264				handled = true;
   265				continue;
   266			}
   267	
   268			virq = irq_find_mapping(ad->irqdomain, hwirq);
   269			if (!virq)
   270				break;
   271	
 > 272			handle_nested_irq(virq);
   273			handled = true;
   274		}
   275	
   276		return handled ? IRQ_HANDLED : IRQ_NONE;
   277	}
   278	
   279	static void ad24xx_i2c_irq_enable(struct irq_data *irq_data)
   280	{
 > 281		struct ad24xx_i2c *ad = irq_data_get_irq_chip_data(irq_data);
 > 282		irq_hw_number_t hwirq = irq_data->hwirq;
   283	
   284		ad->irqs_enabled |= BIT(hwirq);
   285	}
   286	
   287	static void ad24xx_i2c_irq_disable(struct irq_data *irq_data)
   288	{
   289		struct ad24xx_i2c *ad = irq_data_get_irq_chip_data(irq_data);
   290		irq_hw_number_t hwirq = irq_data->hwirq;
   291	
   292		ad->irqs_enabled &= ~BIT(hwirq);
   293	}
   294	
 > 295	static const struct irq_chip ad24xx_i2c_irq_chip = {
 > 296		.name = "ad24xx-i2c",
 > 297		.irq_enable = ad24xx_i2c_irq_enable,
 > 298		.irq_disable = ad24xx_i2c_irq_disable,
   299	};
   300	
   301	static int ad24xx_i2c_irqdomain_map(struct irq_domain *irqdomain,
   302					    unsigned int irq, irq_hw_number_t hwirq)
   303	{
 > 304		irq_set_chip_data(irq, irqdomain->host_data);
 > 305		irq_set_chip_and_handler(irq, &ad24xx_i2c_irq_chip, handle_simple_irq);
 > 306		irq_set_nested_thread(irq, 1);
 > 307		irq_set_noprobe(irq);
   308	
   309		return 0;
   310	}
   311	

-- 
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