During device shutdown or removal, a deadlock can occur between the
PCIe remove path and the driver's asynchronous reset work.
The unregistration path calls napi_disable() before cancelling the
reset work. If the reset work runs concurrently, it may re-enable NAPI
and schedule it. Because the device is being unregistered, this can
lead to NAPI state corruption where NAPI is marked as scheduled but
never polled, causing subsequent napi_disable() calls to hang forever.
Fix this by:
1. Moving cancel_work_sync(&dev->reset_work) to the very start of
mt7925e_unregister_device(), ensuring it is stopped before NAPI
is disabled.
2. Setting the MT76_REMOVED flag early in the PCI remove path to
prevent new reset work from being queued.
3. Checking MT76_REMOVED in mt7925_mac_reset_work() and aborting the
reset early if the device is being removed.
Co-developed-by: Fei Shao <[email protected]>
Signed-off-by: JB Tsai <[email protected]>
Tested-by: Rafael Passos <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Felix Fietkau <[email protected]>
Implement 802.11d-based automatic regulatory domain switching to
dynamically determine the regulatory domain at runtime.
The scan-done event structure by reusing reserved padding and appending
new fields; the layout and values remains backward-compatible with
existing users.
Co-developed-by: Sean Wang <[email protected]>
Signed-off-by: Sean Wang <[email protected]>
Signed-off-by: JB Tsai <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Felix Fietkau <[email protected]>
