[PATCH 0/2] wifi: mt76: mt7615: fix mt7622 wmac init

[Francesco Palmarini via B4 Relay]

On MT7622 the 2.4 GHz wmac fails to come up on most boots with
"Failed to get patch semaphore". The rom does grant the semaphore, but
its reply to the first PATCH_SEM_CONTROL lands on the data ring with an
extra dword in front and gets dropped as tx status, so every retry
finds the semaphore already taken.

Patch 1 handles the shifted event, patch 2 releases the semaphore after
a timeout so a lost reply can't block the init anymore.

Tested on a Xiaomi AX3200 (same hw as Redmi AX6S) running OpenWrt
25.12.6: 0 of 5 boots ok before, 15 of 15 with both patches. Build
tested on wireless-next.

OpenWrt reports of the same failure:
https://github.com/openwrt/openwrt/issues/14874
https://github.com/openwrt/openwrt/issues/17565

Signed-off-by: Francesco Palmarini <palmarini at unive.it>
---
Francesco Palmarini (2):
      wifi: mt76: mt7615: fix lost first mcu event on mt7622
      wifi: mt76: mt7615: release patch semaphore on timeout

 drivers/net/wireless/mediatek/mt76/mt7615/mac.c | 23 +++++++++++++++++++++++
 drivers/net/wireless/mediatek/mt76/mt7615/mcu.c |  4 ++++
 2 files changed, 27 insertions(+)
---
base-commit: 734bef548a96e8774d6eef5dfa2026c6edc4e80b
change-id: 20261025-mt7622-patch-sem-3d455fcf645f

Best regards,
--  
Francesco Palmarini <palmarini at unive.it>