platform/mellanox: mlxbf-tmfifo: implement synchronize_cbs()

TmFIFO invokes virtqueue callbacks from its FIFO work item under
spin_lock_irqsave(). The core's synchronize_rcu() fallback already
covers those sections.

Implement synchronize_cbs() using the existing per-direction locks
instead of waiting for an RCU grace period. fifo->spin_lock[0] covers
the transmit callbacks, including the callback from the timeout
handler. fifo->spin_lock[1] covers the receive callbacks. Take and
release each lock in turn to synchronize with callbacks running
under that lock.

Assisted-by: LLM
Signed-off-by: Karl Mehltretter <kmehltretter@gmail.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20260908053817.26065-6-kmehltretter@gmail.com>

0 files changed, 0 insertions, 0 deletions