Re: [PATCH v2 2/3] irqchip: Add the Sophgo SG2042 MSI interrupt controller

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

Hi Chen,

kernel test robot noticed the following build warnings:

[auto build test WARNING on fac04efc5c793dccbd07e2d59af9f90b7fc0dca4]

url:    https://github.com/intel-lab-lkp/linux/commits/Chen-Wang/dt-bindings-interrupt-controller-Add-Sophgo-SG2042-MSI/20241209-151429
base:   fac04efc5c793dccbd07e2d59af9f90b7fc0dca4
patch link:    https://lore.kernel.org/r/c882fe329932409131be76ce47b81a6155595ce4.1733726057.git.unicorn_wang%40outlook.com
patch subject: [PATCH v2 2/3] irqchip: Add the Sophgo SG2042 MSI interrupt controller
config: arm-randconfig-r131-20241210 (https://download.01.org/0day-ci/archive/20241210/202412101545.Psk65SvD-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 14.2.0
reproduce: (https://download.01.org/0day-ci/archive/20241210/202412101545.Psk65SvD-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202412101545.Psk65SvD-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/irqchip/irq-sg2042-msi.c:64:9: sparse: sparse: cast removes address space '__iomem' of expression
>> drivers/irqchip/irq-sg2042-msi.c:64:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got unsigned int * @@
   drivers/irqchip/irq-sg2042-msi.c:64:9: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/irqchip/irq-sg2042-msi.c:64:9: sparse:     got unsigned int *

vim +/__iomem +64 drivers/irqchip/irq-sg2042-msi.c

    58	
    59	static void sg2042_msi_irq_ack(struct irq_data *d)
    60	{
    61		struct sg2042_msi_data *data  = irq_data_get_irq_chip_data(d);
    62		int bit_off = d->hwirq - data->irq_first;
    63	
  > 64		writel(1 << bit_off, (unsigned int *)data->reg_clr);
    65	
    66		irq_chip_ack_parent(d);
    67	}
    68	

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