Re: [PATCH SPI for-next 2/3] spi: mchp-pci1xxxx: DMA Read support for copying data into SPI Buf

[kernel test robot <lkp@xxxxxxxxx>]

Hi Thangaraj,

kernel test robot noticed the following build warnings:

[auto build test WARNING on broonie-spi/for-next]
[also build test WARNING on linus/master v6.7-rc5 next-20231215]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Thangaraj-Samynathan/spi-mchp-pci1xxxx-Add-support-for-DMA-in-SPI/20231215-195133
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
patch link:    https://lore.kernel.org/r/20231215114748.152319-3-thangaraj.s%40microchip.com
patch subject: [PATCH SPI for-next 2/3] spi: mchp-pci1xxxx: DMA Read support for copying data into SPI Buf
config: arc-randconfig-r132-20231216 (https://download.01.org/0day-ci/archive/20231216/202312161832.s8L4PtmO-lkp@xxxxxxxxx/config)
compiler: arceb-elf-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231216/202312161832.s8L4PtmO-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/202312161832.s8L4PtmO-lkp@xxxxxxxxx/

sparse warnings: (new ones prefixed by >>)
>> drivers/spi/spi-pci1xxxx.c:321:22: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void *base @@     got void [noderef] __iomem * @@
   drivers/spi/spi-pci1xxxx.c:321:22: sparse:     expected void *base
   drivers/spi/spi-pci1xxxx.c:321:22: sparse:     got void [noderef] __iomem *
   drivers/spi/spi-pci1xxxx.c:323:22: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void *base @@     got void [noderef] __iomem * @@
   drivers/spi/spi-pci1xxxx.c:323:22: sparse:     expected void *base
   drivers/spi/spi-pci1xxxx.c:323:22: sparse:     got void [noderef] __iomem *
>> drivers/spi/spi-pci1xxxx.c:325:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got void * @@
   drivers/spi/spi-pci1xxxx.c:325:9: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/spi/spi-pci1xxxx.c:325:9: sparse:     got void *
   drivers/spi/spi-pci1xxxx.c:326:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got void * @@
   drivers/spi/spi-pci1xxxx.c:326:9: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/spi/spi-pci1xxxx.c:326:9: sparse:     got void *
   drivers/spi/spi-pci1xxxx.c:327:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got void * @@
   drivers/spi/spi-pci1xxxx.c:327:9: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/spi/spi-pci1xxxx.c:327:9: sparse:     got void *
   drivers/spi/spi-pci1xxxx.c:328:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got void * @@
   drivers/spi/spi-pci1xxxx.c:328:9: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/spi/spi-pci1xxxx.c:328:9: sparse:     got void *
   drivers/spi/spi-pci1xxxx.c:330:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got void * @@
   drivers/spi/spi-pci1xxxx.c:330:9: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/spi/spi-pci1xxxx.c:330:9: sparse:     got void *
   drivers/spi/spi-pci1xxxx.c:332:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *addr @@     got void * @@
   drivers/spi/spi-pci1xxxx.c:332:9: sparse:     expected void volatile [noderef] __iomem *addr
   drivers/spi/spi-pci1xxxx.c:332:9: sparse:     got void *
   drivers/spi/spi-pci1xxxx.c: note: in included file (through include/linux/mmzone.h, include/linux/gfp.h, include/linux/xarray.h, ...):
   include/linux/page-flags.h:242:46: sparse: sparse: self-comparison always evaluates to false

vim +321 drivers/spi/spi-pci1xxxx.c

   314	
   315	static void pci1xxxx_spi_setup_dma_read(struct pci1xxxx_spi_internal *p,
   316						dma_addr_t dma_addr, u32 len)
   317	{
   318		void *base;
   319	
   320		if (!p->hw_inst)
 > 321			base = p->parent->dma_offset_bar + SPI_DMA_CH0_RD_BASE;
   322		else
   323			base = p->parent->dma_offset_bar + SPI_DMA_CH1_RD_BASE;
   324	
 > 325		writel(DMA_INTR_EN, base + SPI_DMA_CH_CTL1_OFFSET);
   326		writel(len, base + SPI_DMA_CH_XFER_LEN_OFFSET);
   327		writel(lower_32_bits(dma_addr), base + SPI_DMA_CH_SAR_LO_OFFSET);
   328		writel(upper_32_bits(dma_addr), base + SPI_DMA_CH_SAR_HI_OFFSET);
   329		/* Updated SPI Command Registers */
   330		writel(lower_32_bits(SPI_PERI_ADDR_BASE + SPI_MST_CMD_BUF_OFFSET(p->hw_inst)),
   331		       base + SPI_DMA_CH_DAR_LO_OFFSET);
   332		writel(upper_32_bits(SPI_PERI_ADDR_BASE + SPI_MST_CMD_BUF_OFFSET(p->hw_inst)),
   333		       base + SPI_DMA_CH_DAR_HI_OFFSET);
   334	}
   335	

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