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wifi: mac80211: simplify HE capability access

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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: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240111181514.2ef62b43caeb.I8baa604dd3f3399e08b86c99395a2c6a1185d35d@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2024-01-11 18:17:42 +02:00
parent f73ef56c94
commit 6593c7aec7
1 changed files with 5 additions and 27 deletions
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32
net/mac80211/mlme.c
View File

@ -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;