Re: [PATCH] EDAC/amd64: Include MCA error codes in EDAC message

[kernel test robot]

Hi Yazen,

I love your patch! Perhaps something to improve:

[auto build test WARNING on ras/edac-for-next]
[also build test WARNING on linus/master]
[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]

url:    https://github.com/intel-lab-lkp/linux/commits/Yazen-Ghannam/EDAC-amd64-Include-MCA-error-codes-in-EDAC-message/20220623-001158
base:   https://git.kernel.org/pub/scm/linux/kernel/git/ras/ras.git edac-for-next
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20220623/202206230649.5mB3KFtF-lkp@xxxxxxxxx/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/f791cdde2f3ca52076ed5d1185138b80d4d783bf
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Yazen-Ghannam/EDAC-amd64-Include-MCA-error-codes-in-EDAC-message/20220623-001158
        git checkout f791cdde2f3ca52076ed5d1185138b80d4d783bf
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/edac/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

   drivers/edac/amd64_edac.c: In function '__log_ecc_error':
>> drivers/edac/amd64_edac.c:3179:13: warning: variable 'len' set but not used [-Wunused-but-set-variable]
    3179 |         int len;
         |             ^~~


vim +/len +3179 drivers/edac/amd64_edac.c

  3173	
  3174	static void __log_ecc_error(struct mem_ctl_info *mci, struct err_info *err,
  3175				    u8 ecc_type)
  3176	{
  3177		enum hw_event_mc_err_type err_type;
  3178		const char *string;
> 3179		int len;
  3180	
  3181		if (ecc_type == 2)
  3182			err_type = HW_EVENT_ERR_CORRECTED;
  3183		else if (ecc_type == 1)
  3184			err_type = HW_EVENT_ERR_UNCORRECTED;
  3185		else if (ecc_type == 3)
  3186			err_type = HW_EVENT_ERR_DEFERRED;
  3187		else {
  3188			WARN(1, "Something is rotten in the state of Denmark.\n");
  3189			return;
  3190		}
  3191	
  3192		switch (err->err_code) {
  3193		case DECODE_OK:
  3194			string = "";
  3195			break;
  3196		case ERR_NODE:
  3197			string = "Failed to map error addr to a node";
  3198			break;
  3199		case ERR_CSROW:
  3200			string = "Failed to map error addr to a csrow";
  3201			break;
  3202		case ERR_CHANNEL:
  3203			string = "Unknown syndrome - possible error reporting race";
  3204			break;
  3205		case ERR_SYND:
  3206			string = "MCA_SYND not valid - unknown syndrome and csrow";
  3207			break;
  3208		case ERR_NORM_ADDR:
  3209			string = "Cannot decode normalized address";
  3210			break;
  3211		default:
  3212			string = "WTF error";
  3213			break;
  3214		}
  3215	
  3216		len = snprintf(msg, MSG_SIZE, "err_code:0x%04x:0x%04x", err->xec, err->ec);
  3217	
  3218		edac_mc_handle_error(err_type, mci, 1,
  3219				     err->page, err->offset, err->syndrome,
  3220				     err->csrow, err->channel, -1,
  3221				     string, msg);
  3222	}
  3223	

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https://01.org/lkp