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qcacld-3.0: Don't fallback to 11ac if peer doesn't support MCS 10&11

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In 2.4 Ghz, if peer is advertising MCS10/11 in 11ax and doesn't
support LDPC coding then STA downgrades to 11ac but if AP doesn't
advetise MCS 10&11 and LDPC bit is not supported, then STA treats
LDPC as optional in 11ax and would not downgrade to 11ac from 11ax.

Change-Id: I80b4c6615469c21020ed8d671c2d9ec94bd600b4
CRs-Fixed: 2810347
This commit is contained in:
Utkarsh Bhatnagar 2020-11-02 13:17:45 +05:30 • committed by snandini
commit dc10400717
3 changed files with 17 additions and 1 deletions
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5
core/mac/src/pe/lim/lim_prop_exts_utils.c
View file

@ -346,9 +346,14 @@ static inline bool lim_extract_adaptive_11r_cap(uint8_t *ie, uint16_t ie_len)
static void lim_check_peer_ldpc_and_update(struct pe_session *session,
tSirProbeRespBeacon *beacon_struct)
{
/*
* In 2.4G if AP supports HE till MCS 0-9 we can associate
* with HE mode instead downgrading to 11ac
*/
if (session->he_capable &&
WLAN_REG_IS_24GHZ_CH_FREQ(session->curr_op_freq) &&
beacon_struct->he_cap.present &&
lim_check_he_80_mcs11_supp(session, &beacon_struct->he_cap) &&
!beacon_struct->he_cap.ldpc_coding) {
session->he_capable = false;
pe_err("LDPC check failed for HE operation");

3
core/mac/src/pe/lim/lim_utils.c
View file

@ -6759,11 +6759,12 @@ static bool lim_check_is_bss_greater_than_4_nss_supp(struct pe_session *session,
return false;
}
static bool lim_check_he_80_mcs11_supp(struct pe_session *session,
bool lim_check_he_80_mcs11_supp(struct pe_session *session,
tDot11fIEhe_cap *he_cap)
{
uint16_t rx_mcs_map;
uint16_t tx_mcs_map;
rx_mcs_map = he_cap->rx_he_mcs_map_lt_80;
tx_mcs_map = he_cap->tx_he_mcs_map_lt_80;
if ((session->nss == NSS_1x1_MODE) &&

10
core/mac/src/pe/lim/lim_utils.h
View file

@ -1197,6 +1197,16 @@ void lim_log_he_bss_color(struct mac_context *mac,
*/
void lim_log_he_cap(struct mac_context *mac, tDot11fIEhe_cap *he_cap);
/**
* lim_check_he_80_mcs11_supp() - Check whether MCS 0-11 rates are supported
* @session: pointer to PE session
* @he_cap: pointer to HE capabilities
*
* Return: true if MCS 0-11 rates are supported
*/
bool lim_check_he_80_mcs11_supp(struct pe_session *session,
tDot11fIEhe_cap *he_cap);
/**
* lim_update_stads_he_caps() - Copy HE capability into STA DPH hash table entry
* @mac_ctx: pointer to mac context