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wifi: iwlwifi: mld: skip MLO scan trigger when AP has no QBSS Load IE

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When FW PHY statistics report high channel load (MCLM), the driver
triggers an internal MLO scan to find a better link. However, link grade
computation uses the QBSS Load IE from AP beacons, not MCLM data. If
the AP does not broadcast a QBSS Load IE, the scan produces no benefit
as the grade falls back to static band defaults regardless, and the same
bad link will be selected anyway as the active link.

Skip the MLO scan trigger when the AP does not advertise a QBSS Load IE.

Signed-off-by: Avinash Bhatt <avinash.bhatt@intel.com>
Link: https://patch.msgid.link/20260517100550.621538e20244.I7fdccb759508f32991cc06774cc7621725a58bd3@changeid
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
This commit is contained in:
Avinash Bhatt 2026-05-17 10:59:48 +03:00 committed by Miri Korenblit
parent d157c79643
commit 2a5094c088
3 changed files with 12 additions and 3 deletions
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5
drivers/net/wireless/intel/iwlwifi/mld/link.c
View File

@ -859,9 +859,8 @@ iwl_mld_apply_puncturing_penalty(const struct ieee80211_bss_conf *link_conf,
*grade = *grade * (n_subchannels - n_punctured) / n_subchannels;
}
static int
iwl_mld_get_chan_load_from_element(struct iwl_mld *mld,
struct ieee80211_bss_conf *link_conf)
int iwl_mld_get_chan_load_from_element(struct iwl_mld *mld,
struct ieee80211_bss_conf *link_conf)
{
const struct cfg80211_bss_ies *ies;
const struct element *bss_load_elem = NULL;

3
drivers/net/wireless/intel/iwlwifi/mld/link.h
View File

@ -145,6 +145,9 @@ unsigned int iwl_mld_get_link_grade(struct iwl_mld *mld,
unsigned int iwl_mld_get_chan_load(struct iwl_mld *mld,
struct ieee80211_bss_conf *link_conf);
int iwl_mld_get_chan_load_from_element(struct iwl_mld *mld,
struct ieee80211_bss_conf *link_conf);
int iwl_mld_get_chan_load_by_others(struct iwl_mld *mld,
struct ieee80211_bss_conf *link_conf,
bool expect_active_link);

7
drivers/net/wireless/intel/iwlwifi/mld/mlo.c
View File

@ -1100,6 +1100,13 @@ static void iwl_mld_chan_load_update_iter(void *_data, u8 *mac,
if (rcu_access_pointer(link_conf->chanctx_conf) != chanctx)
continue;
/* No QBSS IE - links will be selected based on default channel
* load values, so the same link will be selected again.
* No point in scan.
*/
if (iwl_mld_get_chan_load_from_element(mld, link_conf) < 0)
continue;
if (iwl_mld_chan_load_requires_scan(mld,
link_conf,
new_chan_load)) {