wifi: nl80211: fix sending link ID info of associated BSS

commit dd374f84 ("wifi: nl80211: expose link ID for associated
BSSes") used a top-level attribute to send link ID of the associated
BSS in the nested attribute NL80211_ATTR_BSS. But since NL80211_ATTR_BSS
is a nested attribute of the attributes defined in enum nl80211_bss,
define a new attribute in enum nl80211_bss and use it for sending the
link ID of the BSS.

Fixes: dd374f84 ("wifi: nl80211: expose link ID for associated BSSes")
Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20220708122607.1836958-1-quic_vjakkam@quicinc.comSigned-off-by: Johannes Berg <johannes.berg@intel.com>

include/uapi/linux/nl80211.h

@@ -4904,6 +4904,7 @@ enum nl80211_bss_scan_width {
  *	Contains a nested array of signal strength attributes (u8, dBm),
  *	using the nesting index as the antenna number.
  * @NL80211_BSS_FREQUENCY_OFFSET: frequency offset in KHz
+ * @NL80211_BSS_MLO_LINK_ID: MLO link ID of the BSS (u8).
  * @__NL80211_BSS_AFTER_LAST: internal
  * @NL80211_BSS_MAX: highest BSS attribute
  */
@@ -4929,6 +4930,7 @@ enum nl80211_bss {
 	NL80211_BSS_PARENT_BSSID,
 	NL80211_BSS_CHAIN_SIGNAL,
 	NL80211_BSS_FREQUENCY_OFFSET,
+	NL80211_BSS_MLO_LINK_ID,
 
 	/* keep last */
 	__NL80211_BSS_AFTER_LAST,

net/wireless/nl80211.c

@@ -9991,7 +9991,8 @@ static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb,
 			    (nla_put_u32(msg, NL80211_BSS_STATUS,
 					 NL80211_BSS_STATUS_ASSOCIATED) ||
 			     (wdev->valid_links &&
-			      nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID, link_id))))
+			      nla_put_u8(msg, NL80211_BSS_MLO_LINK_ID,
+					 link_id))))
 				goto nla_put_failure;
 		}
 		break;