From: Shahar S Matityahu <shahar.s.matityahu@xxxxxxxxx>
Allows to easily calculate array length at the end of a TLV.
Signed-off-by: Shahar S Matityahu <shahar.s.matityahu@xxxxxxxxx>
Signed-off-by: Luca Coelho <luciano.coelho@xxxxxxxxx>
---
drivers/net/wireless/intel/iwlwifi/fw/file.h | 15 +++++++++++++++
1 file changed, 15 insertions(+)
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__ */
--
2.23.0.rc1
