linux-kernel - Re: [PATCH v2 4/4] platform/x86: pmc_atom: improve critclk

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Message-ID: <202103152149.SbHz7TVA-lkp@intel.com>
Date:   Mon, 15 Mar 2021 21:25:16 +0800
From:   kernel test robot <lkp@...el.com>
To:     Henning Schild <henning.schild@...mens.com>,
        linux-kernel@...r.kernel.org, linux-leds@...r.kernel.org,
        platform-driver-x86@...r.kernel.org, linux-watchdog@...r.kernel.org
Cc:     kbuild-all@...ts.01.org,
        Srikanth Krishnakar <skrishnakar@...il.com>,
        Jan Kiszka <jan.kiszka@...mens.com>,
        Henning Schild <henning.schild@...mens.com>,
        Gerd Haeussler <gerd.haeussler.ext@...mens.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>
Subject: Re: [PATCH v2 4/4] platform/x86: pmc_atom: improve critclk_systems
 matching for Siemens PCs

Hi Henning,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on pavel-linux-leds/for-next]
[also build test WARNING on tip/master linux/master linus/master v5.12-rc3 next-20210315]
[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/0day-ci/linux/commits/Henning-Schild/add-device-drivers-for-Siemens-Industrial-PCs/20210315-181441
base:   git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds.git for-next
config: x86_64-randconfig-s022-20210315 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-277-gc089cd2d-dirty
        # https://github.com/0day-ci/linux/commit/7b3ce3514b5f314b15ab6e2898104fa3e8e76d59
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Henning-Schild/add-device-drivers-for-Siemens-Industrial-PCs/20210315-181441
        git checkout 7b3ce3514b5f314b15ab6e2898104fa3e8e76d59
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>


"sparse warnings: (new ones prefixed by >>)"
   drivers/platform/x86/pmc_atom.c: note: in included file:
>> include/linux/platform_data/x86/simatic-ipc.h:50:30: sparse: sparse: cast to restricted __le32

vim +50 include/linux/platform_data/x86/simatic-ipc.h

051f5729fd6fb4 Henning Schild 2021-03-15  30  
051f5729fd6fb4 Henning Schild 2021-03-15  31  static inline u32 simatic_ipc_get_station_id(u8 *data, int max_len)
051f5729fd6fb4 Henning Schild 2021-03-15  32  {
051f5729fd6fb4 Henning Schild 2021-03-15  33  	u32 station_id = SIMATIC_IPC_INVALID_STATION_ID;
051f5729fd6fb4 Henning Schild 2021-03-15  34  	int i;
051f5729fd6fb4 Henning Schild 2021-03-15  35  	struct {
051f5729fd6fb4 Henning Schild 2021-03-15  36  		u8	type;		/* type (0xff = binary) */
051f5729fd6fb4 Henning Schild 2021-03-15  37  		u8	len;		/* len of data entry */
051f5729fd6fb4 Henning Schild 2021-03-15  38  		u8	reserved[3];
051f5729fd6fb4 Henning Schild 2021-03-15  39  		u32	station_id;	/* station id (LE) */
051f5729fd6fb4 Henning Schild 2021-03-15  40  	} __packed
051f5729fd6fb4 Henning Schild 2021-03-15  41  	*data_entry = (void *)data + sizeof(struct dmi_header);
051f5729fd6fb4 Henning Schild 2021-03-15  42  
051f5729fd6fb4 Henning Schild 2021-03-15  43  	/* find 4th entry in OEM data */
051f5729fd6fb4 Henning Schild 2021-03-15  44  	for (i = 0; i < 3; i++)
051f5729fd6fb4 Henning Schild 2021-03-15  45  		data_entry = (void *)((u8 *)(data_entry) + data_entry->len);
051f5729fd6fb4 Henning Schild 2021-03-15  46  
051f5729fd6fb4 Henning Schild 2021-03-15  47  	/* decode station id */
051f5729fd6fb4 Henning Schild 2021-03-15  48  	if (data_entry && (u8 *)data_entry < data + max_len &&
051f5729fd6fb4 Henning Schild 2021-03-15  49  	    data_entry->type == 0xff && data_entry->len == 9)
051f5729fd6fb4 Henning Schild 2021-03-15 @50  		station_id = le32_to_cpu(data_entry->station_id);
051f5729fd6fb4 Henning Schild 2021-03-15  51  
051f5729fd6fb4 Henning Schild 2021-03-15  52  	return station_id;
051f5729fd6fb4 Henning Schild 2021-03-15  53  }
051f5729fd6fb4 Henning Schild 2021-03-15  54  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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