Re: [PATCH v2 2/4] mmc: loongson2: Add Loongson-2K SD/SDIO controller driver

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

Hi Binbin,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 9e12816f9a6195f1f5b7c5dc2e388c2458411b97]

url:    https://github.com/intel-lab-lkp/linux/commits/Binbin-Zhou/dt-bindings-mmc-Add-Loongson-2K-SD-SDIO-eMMC-controller-binding/20250507-153435
base:   9e12816f9a6195f1f5b7c5dc2e388c2458411b97
patch link:    https://lore.kernel.org/r/1308b6ca9ffc2674cc0f089cfd163da87e53a8cd.1746581751.git.zhoubinbin%40loongson.cn
patch subject: [PATCH v2 2/4] mmc: loongson2: Add Loongson-2K SD/SDIO controller driver
config: csky-randconfig-r112-20250513 (https://download.01.org/0day-ci/archive/20250513/202505130918.uanOGxju-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 14.2.0
reproduce: (https://download.01.org/0day-ci/archive/20250513/202505130918.uanOGxju-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/202505130918.uanOGxju-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/mmc/host/loongson2-mmc.c:534:41: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned int [usertype] @@     got restricted __be32 [usertype] @@
   drivers/mmc/host/loongson2-mmc.c:534:41: sparse:     expected unsigned int [usertype]
   drivers/mmc/host/loongson2-mmc.c:534:41: sparse:     got restricted __be32 [usertype]

vim +534 drivers/mmc/host/loongson2-mmc.c

   500	
   501	static int loongson2_reorder_cmd_list[] = { SD_APP_SEND_SCR, SD_APP_SEND_NUM_WR_BLKS,
   502						    SD_APP_SD_STATUS, MMC_SEND_WRITE_PROT,
   503						    SD_SWITCH };
   504	
   505	/*
   506	 * According to SD spec, ACMD13, ACMD22, ACMD51 and CMD30
   507	 * response datas has different byte order with usual data packets.
   508	 * However sdio controller will send these datas in usual data format,
   509	 * so we need to adjust these datas to a protocol consistent byte order.
   510	 */
   511	static void loongson2_mmc_reorder_cmd_data(struct loongson2_mmc_host *host,
   512						   struct mmc_command *cmd)
   513	{
   514		struct scatterlist *sg;
   515		u32 *data;
   516		int i, j;
   517	
   518		if (mmc_cmd_type(cmd) != MMC_CMD_ADTC)
   519			return;
   520	
   521		for (i = 0; i < ARRAY_SIZE(loongson2_reorder_cmd_list); i++)
   522			if (cmd->opcode == loongson2_reorder_cmd_list[i])
   523				break;
   524	
   525		if (i == ARRAY_SIZE(loongson2_reorder_cmd_list))
   526			return;
   527	
   528		for_each_sg(cmd->data->sg, sg, cmd->data->sg_len, i) {
   529			data = sg_virt(&sg[i]);
   530			for (j = 0; j < (sg_dma_len(&sg[i]) / 4); j++)
   531				if (cmd->opcode == SD_SWITCH)
   532					data[j] = bitrev8x4(data[j]);
   533				else
 > 534					data[j] = cpu_to_be32(data[j]);
   535		}
   536	}
   537	

-- 
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