Commit 6593c7ae authored by Johannes Berg's avatar Johannes Berg
Browse files

wifi: mac80211: simplify HE capability access 



For verifying the required HE capabilities are supported
locally, we access the HE capability element of the AP.
Simplify that access, we've already parsed and validated
it when parsing elements.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Reviewed-by: default avatarGregory Greenman <gregory.greenman@intel.com>
Signed-off-by: default avatarMiri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240111181514.2ef62b43caeb.I8baa604dd3f3399e08b86c99395a2c6a1185d35d@changeid


Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent f73ef56c

net/mac80211/mlme.c

+5 −27
Original line number Diff line number Diff line
@@ -4547,41 +4547,17 @@ static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 


static bool

ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata,

				     const struct cfg80211_bss_ies *ies,

				     const struct ieee80211_he_cap_elem *he_cap,

				     const struct ieee80211_he_operation *he_op)

{

	const struct element *he_cap_elem;

	const struct ieee80211_he_cap_elem *he_cap;

	struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;

	u16 mcs_80_map_tx, mcs_80_map_rx;

	u16 ap_min_req_set;

	int mcs_nss_size;

	int nss;



	he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,

					     ies->data, ies->len);



	if (!he_cap_elem)

	if (!he_cap)

		return false;



	/* invalid HE IE */

	if (he_cap_elem->datalen < 1 + sizeof(*he_cap)) {

		sdata_info(sdata,

			   "Invalid HE elem, Disable HE\n");

		return false;

	}



	/* skip one byte ext_tag_id */

	he_cap = (void *)(he_cap_elem->data + 1);

	mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);



	/* invalid HE IE */

	if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) {

		sdata_info(sdata,

			   "Invalid HE elem with nss size, Disable HE\n");

		return false;

	}



	/* mcs_nss is right after he_cap info */

	he_mcs_nss_supp = (void *)(he_cap + 1);
@@ -4946,7 +4922,9 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 
			}

		}



		if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) ||

		if (!ieee80211_verify_peer_he_mcs_support(sdata,

							  (void *)elems->he_cap,

							  he_oper) ||

		    !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper))

			*conn_flags |= IEEE80211_CONN_DISABLE_HE |

				       IEEE80211_CONN_DISABLE_EHT;