Re: [linux-next:master 990/1252] drivers/mtd/nand/raw/brcmnand/bcma_nand.c:61:23: sparse: sparse: cast to restricted __be32

[Miquel Raynal <miquel.raynal@bootlin.com>]

Hi Florian,

lkp@intel.com wrote on Mon, 24 Jan 2022 22:30:29 +0800:

> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head:   74e5dee6a5b9683e4e78aad784c6c807833cb89b
> commit: feca4cc4765a67907a97bddfa94aa6901cbbce7d [990/1252] mtd: rawnand: brcmnand: Add BCMA shim
> config: alpha-randconfig-s032-20220124 (https://download.01.org/0day-ci/archive/20220124/202201242253.FYuBom60-lkp@intel.com/config)
> compiler: alpha-linux-gcc (GCC) 11.2.0
> 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: v0.6.4-dirty
>         # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=feca4cc4765a67907a97bddfa94aa6901cbbce7d
>         git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
>         git fetch --no-tags linux-next master
>         git checkout feca4cc4765a67907a97bddfa94aa6901cbbce7d
>         # save the config file to linux build tree
>         mkdir build_dir
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=alpha SHELL=/bin/bash drivers/mtd/nand/raw/brcmnand/
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
> 
> 
> sparse warnings: (new ones prefixed by >>)
> >> drivers/mtd/nand/raw/brcmnand/bcma_nand.c:61:23: sparse: sparse: cast to restricted __be32
> >> drivers/mtd/nand/raw/brcmnand/bcma_nand.c:61:23: sparse: sparse: cast to restricted __be32
> >> drivers/mtd/nand/raw/brcmnand/bcma_nand.c:61:23: sparse: sparse: cast to restricted __be32
> >> drivers/mtd/nand/raw/brcmnand/bcma_nand.c:61:23: sparse: sparse: cast to restricted __be32
> >> drivers/mtd/nand/raw/brcmnand/bcma_nand.c:61:23: sparse: sparse: cast to restricted __be32
> >> drivers/mtd/nand/raw/brcmnand/bcma_nand.c:61:23: sparse: sparse: cast to restricted __be32
> >> drivers/mtd/nand/raw/brcmnand/bcma_nand.c:78:21: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned int [usertype] val @@     got restricted __be32 [usertype] @@  
>    drivers/mtd/nand/raw/brcmnand/bcma_nand.c:78:21: sparse:     expected unsigned int [usertype] val
>    drivers/mtd/nand/raw/brcmnand/bcma_nand.c:78:21: sparse:     got restricted __be32 [usertype]
> 

Can you send a fixup! for that? If it applies easily on nand/next I'll
squash it, otherwise please just send a regular patch and I will queue
it as usual.

> vim +61 drivers/mtd/nand/raw/brcmnand/bcma_nand.c
> 
>     45	
>     46	static u32 brcmnand_bcma_read_reg(struct brcmnand_soc *soc, u32 offset)
>     47	{
>     48		struct brcmnand_bcma_soc *sc = to_bcma_soc(soc);
>     49		u32 val;
>     50	
>     51		/* Offset into the NAND block and deal with the flash cache separately */
>     52		if (offset == BRCMNAND_NON_MMIO_FC_ADDR)
>     53			offset = BCMA_CC_NAND_CACHE_DATA;
>     54		else
>     55			offset += BCMA_CC_NAND_REVISION;
>     56	
>     57		val = bcma_cc_read32(sc->cc, offset);
>     58	
>     59		/* Swap if necessary */
>     60		if (brcmnand_bcma_needs_swapping(offset))
>   > 61			val = be32_to_cpu(val);  
>     62		return val;
>     63	}
>     64	
>     65	static void brcmnand_bcma_write_reg(struct brcmnand_soc *soc, u32 val,
>     66					    u32 offset)
>     67	{
>     68		struct brcmnand_bcma_soc *sc = to_bcma_soc(soc);
>     69	
>     70		/* Offset into the NAND block */
>     71		if (offset == BRCMNAND_NON_MMIO_FC_ADDR)
>     72			offset = BCMA_CC_NAND_CACHE_DATA;
>     73		else
>     74			offset += BCMA_CC_NAND_REVISION;
>     75	
>     76		/* Swap if necessary */
>     77		if (brcmnand_bcma_needs_swapping(offset))
>   > 78			val = cpu_to_be32(val);  
>     79	
>     80		bcma_cc_write32(sc->cc, offset, val);
>     81	}
>     82	
> 
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org


Thanks,
Miquèl