[broonie-spi:for-6.20 2/42] drivers/spi/spi-aspeed-smc.c:909:35: sparse: sparse: incorrect type in argument 2 (different address spaces)

[broonie-spi:for-6.20 2/42] drivers/spi/spi-aspeed-smc.c:909:35: sparse: sparse: incorrect type in argument 2 (different address spaces)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-6.20
head:   40534d19ed2afb880ecf202dab26a8e7a5808d16
commit: 04f7516ab70f7b82aae1d2830af2ee6f17f3fe98 [2/42] spi: aspeed: Add support for non-spi-mem devices
config: mips-randconfig-r134-20260523 (https://download.01.org/0day-ci/archive/20260524/202605240240.yLBPcZCa-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 5bac06718f502014fade905512f1d26d578a18f3)
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260524/202605240240.yLBPcZCa-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/202605240240.yLBPcZCa-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/spi/spi-aspeed-smc.c:909:35: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *mem @@     got void *dst @@
   drivers/spi/spi-aspeed-smc.c:909:35: sparse:     expected void volatile [noderef] __iomem *mem
   drivers/spi/spi-aspeed-smc.c:909:35: sparse:     got void *dst
   drivers/spi/spi-aspeed-smc.c:939:46: sparse: sparse: cast removes address space '__iomem' of expression
   drivers/spi/spi-aspeed-smc.c:1469:61: sparse: sparse: undefined identifier 'cols'
   drivers/spi/spi-aspeed-smc.c:1469:61: sparse: sparse: bad constant expression type
   drivers/spi/spi-aspeed-smc.c:1469:55: sparse: sparse: undefined identifier 'rows'
   drivers/spi/spi-aspeed-smc.c:1469:55: sparse: sparse: bad constant expression type

vim +909 drivers/spi/spi-aspeed-smc.c

   890	
   891	static void aspeed_spi_user_transfer_tx(struct aspeed_spi *aspi,
   892						struct spi_device *spi,
   893						const u8 *tx_buf, u8 *rx_buf,
   894						void *dst, u32 len)
   895	{
   896		const struct aspeed_spi_data *data = aspi->data;
   897		bool full_duplex_transfer = data->full_duplex && tx_buf == rx_buf;
   898		u32 i;
   899	
   900		if (full_duplex_transfer &&
   901		    !!(spi->mode & (SPI_TX_DUAL | SPI_TX_QUAD |
   902				    SPI_RX_DUAL | SPI_RX_QUAD))) {
   903			dev_err(aspi->dev,
   904				"full duplex is only supported for single IO mode\n");
   905			return;
   906		}
   907	
   908		for (i = 0; i < len; i++) {
 > 909			writeb(tx_buf[i], dst);
   910			if (full_duplex_transfer)
   911				rx_buf[i] = readb(aspi->regs + FULL_DUPLEX_RX_DATA);
   912		}
   913	}
   914	

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