diff options
| author | Shahar S Matityahu <shahar.s.matityahu@intel.com> | 2019-07-22 12:40:51 +0300 |
|---|---|---|
| committer | Luca Coelho <luciano.coelho@intel.com> | 2019-09-06 15:52:06 +0300 |
| commit | a29f6576c31d53076c717bd8b1a525f175b671cd (patch) | |
| tree | d6ab9423e314ec77189d34342d08af84036d3832 /drivers/net/wireless/intel/iwlwifi/fw | |
| parent | 94b952b55c4d0a925aaa17e0a6994d8d7e47a7df (diff) | |
iwlwifi: add iwl_tlv_array_len()
Allows to easily calculate array length at the end of a TLV.
Signed-off-by: Shahar S Matityahu <shahar.s.matityahu@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/fw')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/fw/file.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/file.h b/drivers/net/wireless/intel/iwlwifi/fw/file.h index 329b00e90fa4..1bdcab9b9275 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/file.h +++ b/drivers/net/wireless/intel/iwlwifi/fw/file.h @@ -972,4 +972,19 @@ struct iwl_fw_cmd_version { u8 notif_ver; } __packed; +static inline size_t _iwl_tlv_array_len(const struct iwl_ucode_tlv *tlv, + size_t fixed_size, size_t var_size) +{ + size_t var_len = le32_to_cpu(tlv->length) - fixed_size; + + if (WARN_ON(var_len % var_size)) + return 0; + + return var_len / var_size; +} + +#define iwl_tlv_array_len(_tlv_ptr, _struct_ptr, _memb) \ + _iwl_tlv_array_len((_tlv_ptr), sizeof(*(_struct_ptr)), \ + sizeof(_struct_ptr->_memb[0])) + #endif /* __iwl_fw_file_h__ */ |