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The driver fails to register with error -22 (EINVAL) due to a cfg80211 validation failure in wiphy_verify_iface_combinations(). Commit5ef0e8e265("wifi: mt76: mt7996: fix iface combination for different chipsets") added beacon_int_min_gcd to if_comb_global and if_comb_global_7992, but these combinations include ADHOC (IBSS) interface type. This violates a cfg80211 rule from commit56271da29c("cfg80211: disallow beacon_int_min_gcd with IBSS") that explicitly forbids combining ADHOC with beacon_int_min_gcd. The restriction exists because beacon_int_min_gcd requires static, predictable beacon intervals to coordinate multiple beaconing interfaces, but ADHOC interfaces have dynamic beacon intervals that change when joining different networks, making the GCD constraint unenforceable. Remove beacon_int_min_gcd from the interface combinations that include ADHOC because they are not necessary for ADHOC operation. The if_comb combination (AP/MESH/STA only, without ADHOC) correctly retains beacon_int_min_gcd for multi-AP coordination. Fixes:5ef0e8e265("wifi: mt76: mt7996: fix iface combination for different chipsets") Signed-off-by: Jose Ignacio Tornos Martinez <jtornosm@redhat.com> Tested-by: Alex Gavin <alex.gavin@candelatech.com> Link: https://patch.msgid.link/20260702104337.679536-1-jtornosm@redhat.com Signed-off-by: Felix Fietkau <nbd@nbd.name>
Linux kernel ============ The Linux kernel is the core of any Linux operating system. It manages hardware, system resources, and provides the fundamental services for all other software. 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