linux-kernel - [cxl-cxl:pending 10/11] drivers/cxl/pci.c:1302:34: sparse: sparse: cast to restricted _

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Date:   Tue, 10 Aug 2021 11:10:22 +0800
From:   kernel test robot <lkp@...el.com>
To:     Ira Weiny <ira.weiny@...el.com>
Cc:     kbuild-all@...ts.01.org,
        Alison Schofield <alison.schofield@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Ira Weiny <ira.weiny@...el.com>,
        Ben Widawsky <ben.widawsky@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        linux-kernel@...r.kernel.org,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: [cxl-cxl:pending 10/11] drivers/cxl/pci.c:1302:34: sparse: sparse:
 cast to restricted __le64

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git pending
head:   427832674f6e2413c21ca2271ec945a720608ff2
commit: f2e82407d7df984ef4369bd9a8cf749991db87a0 [10/11] cxl/mem: Account for partitionable space in ram/pmem ranges
config: i386-randconfig-s002-20210809 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-348-gf0e6938b-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git/commit/?id=f2e82407d7df984ef4369bd9a8cf749991db87a0
        git remote add cxl-cxl https://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git
        git fetch --no-tags cxl-cxl pending
        git checkout f2e82407d7df984ef4369bd9a8cf749991db87a0
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash drivers/cxl/

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/cxl/pci.c:1302:34: sparse: sparse: cast to restricted __le64
   drivers/cxl/pci.c:1303:36: sparse: sparse: cast to restricted __le64
   drivers/cxl/pci.c:1304:32: sparse: sparse: cast to restricted __le64
   drivers/cxl/pci.c:1305:34: sparse: sparse: cast to restricted __le64

vim +1302 drivers/cxl/pci.c

  1265	
  1266	/**
  1267	 * cxl_mem_get_partition_info - Get partition info
  1268	 * @cxlm: The device to act on
  1269	 * @active_volatile_bytes: returned active volatile capacity; in bytes
  1270	 * @active_persistent_bytes: returned active persistent capacity; in bytes
  1271	 * @next_volatile_bytes: return next volatile capacity; in bytes
  1272	 * @next_persistent_bytes: return next persistent capacity; in bytes
  1273	 *
  1274	 * Retrieve the current partition info for the device specified.  The active
  1275	 * values are the current capacity in bytes.  If not 0, the 'next' values are
  1276	 * the pending values, in bytes, which take affect on next cold reset.
  1277	 *
  1278	 * Return: 0 if no error: or the result of the mailbox command.
  1279	 *
  1280	 * See CXL @8.2.9.5.2.1 Get Partition Info
  1281	 */
  1282	static int cxl_mem_get_partition_info(struct cxl_mem *cxlm,
  1283					      u64 *active_volatile_bytes,
  1284					      u64 *active_persistent_bytes,
  1285					      u64 *next_volatile_bytes,
  1286					      u64 *next_persistent_bytes)
  1287	{
  1288		struct cxl_mbox_get_partition_info {
  1289			u64 active_volatile_cap;
  1290			u64 active_persistent_cap;
  1291			u64 next_volatile_cap;
  1292			u64 next_persistent_cap;
  1293		} __packed pi;
  1294		int rc;
  1295	
  1296		rc = cxl_mem_mbox_send_cmd(cxlm, CXL_MBOX_OP_GET_PARTITION_INFO,
  1297					   NULL, 0, &pi, sizeof(pi));
  1298	
  1299		if (rc)
  1300			return rc;
  1301	
> 1302		*active_volatile_bytes = le64_to_cpu(pi.active_volatile_cap);
  1303		*active_persistent_bytes = le64_to_cpu(pi.active_persistent_cap);
  1304		*next_volatile_bytes = le64_to_cpu(pi.next_volatile_cap);
  1305		*next_persistent_bytes = le64_to_cpu(pi.next_volatile_cap);
  1306	
  1307		*active_volatile_bytes *= CXL_CAPACITY_MULTIPLIER;
  1308		*active_persistent_bytes *= CXL_CAPACITY_MULTIPLIER;
  1309		*next_volatile_bytes *= CXL_CAPACITY_MULTIPLIER;
  1310		*next_persistent_bytes *= CXL_CAPACITY_MULTIPLIER;
  1311	
  1312		return 0;
  1313	}
  1314	

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

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