static int btintel_parse_version_tlv()

in btintel.c [507:607]

• 77 lines of code
• 21 McCabe index (conditional complexity)

static int btintel_parse_version_tlv(struct hci_dev *hdev,
				     struct intel_version_tlv *version,
				     struct sk_buff *skb)
{
	/* Consume Command Complete Status field */
	skb_pull(skb, 1);

	/* Event parameters contatin multiple TLVs. Read each of them
	 * and only keep the required data. Also, it use existing legacy
	 * version field like hw_platform, hw_variant, and fw_variant
	 * to keep the existing setup flow
	 */
	while (skb->len) {
		struct intel_tlv *tlv;

		/* Make sure skb has a minimum length of the header */
		if (skb->len < sizeof(*tlv))
			return -EINVAL;

		tlv = (struct intel_tlv *)skb->data;

		/* Make sure skb has a enough data */
		if (skb->len < tlv->len + sizeof(*tlv))
			return -EINVAL;

		switch (tlv->type) {
		case INTEL_TLV_CNVI_TOP:
			version->cnvi_top = get_unaligned_le32(tlv->val);
			break;
		case INTEL_TLV_CNVR_TOP:
			version->cnvr_top = get_unaligned_le32(tlv->val);
			break;
		case INTEL_TLV_CNVI_BT:
			version->cnvi_bt = get_unaligned_le32(tlv->val);
			break;
		case INTEL_TLV_CNVR_BT:
			version->cnvr_bt = get_unaligned_le32(tlv->val);
			break;
		case INTEL_TLV_DEV_REV_ID:
			version->dev_rev_id = get_unaligned_le16(tlv->val);
			break;
		case INTEL_TLV_IMAGE_TYPE:
			version->img_type = tlv->val[0];
			break;
		case INTEL_TLV_TIME_STAMP:
			/* If image type is Operational firmware (0x03), then
			 * running FW Calendar Week and Year information can
			 * be extracted from Timestamp information
			 */
			version->min_fw_build_cw = tlv->val[0];
			version->min_fw_build_yy = tlv->val[1];
			version->timestamp = get_unaligned_le16(tlv->val);
			break;
		case INTEL_TLV_BUILD_TYPE:
			version->build_type = tlv->val[0];
			break;
		case INTEL_TLV_BUILD_NUM:
			/* If image type is Operational firmware (0x03), then
			 * running FW build number can be extracted from the
			 * Build information
			 */
			version->min_fw_build_nn = tlv->val[0];
			version->build_num = get_unaligned_le32(tlv->val);
			break;
		case INTEL_TLV_SECURE_BOOT:
			version->secure_boot = tlv->val[0];
			break;
		case INTEL_TLV_OTP_LOCK:
			version->otp_lock = tlv->val[0];
			break;
		case INTEL_TLV_API_LOCK:
			version->api_lock = tlv->val[0];
			break;
		case INTEL_TLV_DEBUG_LOCK:
			version->debug_lock = tlv->val[0];
			break;
		case INTEL_TLV_MIN_FW:
			version->min_fw_build_nn = tlv->val[0];
			version->min_fw_build_cw = tlv->val[1];
			version->min_fw_build_yy = tlv->val[2];
			break;
		case INTEL_TLV_LIMITED_CCE:
			version->limited_cce = tlv->val[0];
			break;
		case INTEL_TLV_SBE_TYPE:
			version->sbe_type = tlv->val[0];
			break;
		case INTEL_TLV_OTP_BDADDR:
			memcpy(&version->otp_bd_addr, tlv->val,
							sizeof(bdaddr_t));
			break;
		default:
			/* Ignore rest of information */
			break;
		}
		/* consume the current tlv and move to next*/
		skb_pull(skb, tlv->len + sizeof(*tlv));
	}

	return 0;
}