Hello,o after upgrading to 6.12.49 my wlan adapter stops working. It is detected:
kernel: mt76x2u 4-2:1.0: ASIC revision: 76120044 kernel: mt76x2u 4-2:1.0: ROM patch build: 20141115060606a kernel: usb 3-4: reset high-speed USB device number 2 using xhci_hcd kernel: mt76x2u 4-2:1.0: Firmware Version: 0.0.00 kernel: mt76x2u 4-2:1.0: Build: 1 kernel: mt76x2u 4-2:1.0: Build Time: 201507311614____
but does nor work. The following 2 messages probably are relevant:
kernel: mt76x2u 4-2:1.0: MAC RX failed to stop kernel: mt76x2u 4-2:1.0: MAC RX failed to stop
later I see a lot of
kernel: mt76x2u 4-2:1.0: error: mt76x02u_mcu_wait_resp failed with -110
I bisected it down to commit
9b28ef1e4cc07cdb35da257aa4358d0127168b68 usb: xhci: remove option to change a default ring's TRB cycle bit
9b28ef1e4cc07cdb35da257aa4358d0127168b68 is the first bad commit commit 9b28ef1e4cc07cdb35da257aa4358d0127168b68 Author: Niklas Neronin niklas.neronin@linux.intel.com Date: Wed Sep 17 08:39:07 2025 -0400
usb: xhci: remove option to change a default ring's TRB cycle bit
[ Upstream commit e1b0fa863907a61e86acc19ce2d0633941907c8e ]
The TRB cycle bit indicates TRB ownership by the Host Controller (HC) or Host Controller Driver (HCD). New rings are initialized with 'cycle_state' equal to one, and all its TRBs' cycle bits are set to zero. When handling ring expansion, set the source ring cycle bits to the same value as the destination ring.
Move the cycle bit setting from xhci_segment_alloc() to xhci_link_rings(), and remove the 'cycle_state' argument from xhci_initialize_ring_info(). The xhci_segment_alloc() function uses kzalloc_node() to allocate segments, ensuring that all TRB cycle bits are initialized to zero.
Signed-off-by: Niklas Neronin niklas.neronin@linux.intel.com Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com Link: https://lore.kernel.org/r/20241106101459.775897-12-mathias.nyman@linux.intel... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Stable-dep-of: a5c98e8b1398 ("xhci: dbc: Fix full DbC transfer ring after several reconnects") Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
Regards,