Hi Kai-Heng,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on bluetooth-next/master]
[also build test WARNING on bluetooth/master v5.9 next-20201023]
[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/Kai-Heng-Feng/Bluetooth-btrtl-Ask-8821C-to-drop-old-firmware-after-shutdown/20201022-222743
base:   
https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git 
master
config: m68k-randconfig-s031-20201023 (attached as .config)
compiler: m68k-linux-gcc (GCC) 9.3.0
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: v0.6.3-17-g2d3af347-dirty
        # 
https://github.com/0day-ci/linux/commit/d430672c074dec68229560c1d1309c99cc769efe
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review 
Kai-Heng-Feng/Bluetooth-btrtl-Ask-8821C-to-drop-old-firmware-after-shutdown/20201022-222743
        git checkout d430672c074dec68229560c1d1309c99cc769efe
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 
CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=m68k 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>


"sparse warnings: (new ones prefixed by >>)"
>> drivers/bluetooth/btrtl.c:589:37: sparse: sparse: restricted __le16 degrades 
>> to integer
>> drivers/bluetooth/btrtl.c:589:37: sparse: sparse: cast to restricted __le16
>> drivers/bluetooth/btrtl.c:589:37: sparse: sparse: restricted __le16 degrades 
>> to integer
>> drivers/bluetooth/btrtl.c:589:37: sparse: sparse: cast to restricted __le16
>> drivers/bluetooth/btrtl.c:589:37: sparse: sparse: restricted __le16 degrades 
>> to integer
>> drivers/bluetooth/btrtl.c:589:37: sparse: sparse: cast to restricted __le16
>> drivers/bluetooth/btrtl.c:589:37: sparse: sparse: restricted __le16 degrades 
>> to integer
>> drivers/bluetooth/btrtl.c:589:37: sparse: sparse: cast to restricted __le16
   drivers/bluetooth/btrtl.c:590:37: sparse: sparse: restricted __le16 degrades 
to integer
   drivers/bluetooth/btrtl.c:590:37: sparse: sparse: cast to restricted __le16
   drivers/bluetooth/btrtl.c:590:37: sparse: sparse: restricted __le16 degrades 
to integer
   drivers/bluetooth/btrtl.c:590:37: sparse: sparse: cast to restricted __le16
   drivers/bluetooth/btrtl.c:590:37: sparse: sparse: restricted __le16 degrades 
to integer
   drivers/bluetooth/btrtl.c:590:37: sparse: sparse: cast to restricted __le16
   drivers/bluetooth/btrtl.c:590:37: sparse: sparse: restricted __le16 degrades 
to integer
   drivers/bluetooth/btrtl.c:590:37: sparse: sparse: cast to restricted __le16
   drivers/bluetooth/btrtl.c: note: in included file:
   drivers/bluetooth/btrtl.h:47:45: sparse: sparse: array of flexible structures

vim +589 drivers/bluetooth/btrtl.c

   556  
   557  struct btrtl_device_info *btrtl_initialize(struct hci_dev *hdev,
   558                                             const char *postfix)
   559  {
   560          struct btrtl_device_info *btrtl_dev;
   561          struct sk_buff *skb;
   562          struct hci_rp_read_local_version *resp;
   563          char cfg_name[40];
   564          u16 hci_rev, lmp_subver;
   565          u8 hci_ver;
   566          int ret;
   567  
   568          btrtl_dev = kzalloc(sizeof(*btrtl_dev), GFP_KERNEL);
   569          if (!btrtl_dev) {
   570                  ret = -ENOMEM;
   571                  goto err_alloc;
   572          }
   573  
   574          skb = btrtl_read_local_version(hdev);
   575          if (IS_ERR(skb)) {
   576                  ret = PTR_ERR(skb);
   577                  goto err_free;
   578          }
   579  
   580          resp = (struct hci_rp_read_local_version *)skb->data;
   581          rtl_dev_info(hdev, "examining hci_ver=%02x hci_rev=%04x 
lmp_ver=%02x lmp_subver=%04x",
   582                       resp->hci_ver, resp->hci_rev,
   583                       resp->lmp_ver, resp->lmp_subver);
   584  
   585          hci_ver = resp->hci_ver;
   586          hci_rev = le16_to_cpu(resp->hci_rev);
   587          lmp_subver = le16_to_cpu(resp->lmp_subver);
   588  
 > 589          if (resp->hci_ver == 0x8 && le16_to_cpu(resp->hci_rev == 
 > 0x826c) &&
   590              resp->lmp_ver == 0x8 && le16_to_cpu(resp->lmp_subver == 
0xa99e))
   591                  btrtl_dev->drop_fw = true;
   592  
   593          kfree_skb(skb);
   594  
   595          btrtl_dev->ic_info = btrtl_match_ic(lmp_subver, hci_rev, 
hci_ver,
   596                                              hdev->bus);
   597  
   598          if (!btrtl_dev->ic_info) {
   599                  rtl_dev_info(hdev, "unknown IC info, lmp subver %04x, 
hci rev %04x, hci ver %04x",
   600                              lmp_subver, hci_rev, hci_ver);
   601                  return btrtl_dev;
   602          }
   603  
   604          if (btrtl_dev->ic_info->has_rom_version) {
   605                  ret = rtl_read_rom_version(hdev, 
&btrtl_dev->rom_version);
   606                  if (ret)
   607                          goto err_free;
   608          }
   609  
   610          btrtl_dev->fw_len = rtl_load_file(hdev, 
btrtl_dev->ic_info->fw_name,
   611                                            &btrtl_dev->fw_data);
   612          if (btrtl_dev->fw_len < 0) {
   613                  rtl_dev_err(hdev, "firmware file %s not found",
   614                              btrtl_dev->ic_info->fw_name);
   615                  ret = btrtl_dev->fw_len;
   616                  goto err_free;
   617          }
   618  
   619          if (btrtl_dev->ic_info->cfg_name) {
   620                  if (postfix) {
   621                          snprintf(cfg_name, sizeof(cfg_name), 
"%s-%s.bin",
   622                                   btrtl_dev->ic_info->cfg_name, postfix);
   623                  } else {
   624                          snprintf(cfg_name, sizeof(cfg_name), "%s.bin",
   625                                   btrtl_dev->ic_info->cfg_name);
   626                  }
   627                  btrtl_dev->cfg_len = rtl_load_file(hdev, cfg_name,
   628                                                     
&btrtl_dev->cfg_data);
   629                  if (btrtl_dev->ic_info->config_needed &&
   630                      btrtl_dev->cfg_len <= 0) {
   631                          rtl_dev_err(hdev, "mandatory config file %s not 
found",
   632                                      btrtl_dev->ic_info->cfg_name);
   633                          ret = btrtl_dev->cfg_len;
   634                          goto err_free;
   635                  }
   636          }
   637  
   638          return btrtl_dev;
   639  
   640  err_free:
   641          btrtl_free(btrtl_dev);
   642  err_alloc:
   643          return ERR_PTR(ret);
   644  }
   645  EXPORT_SYMBOL_GPL(btrtl_initialize);
   646  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email protected]

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