question regarding ordering in btintel_pcie_send_sync()

[Oliver Neukum <oneukum@xxxxxxxx>]

Hi,

I was looking at the code. I do not have documentation for the
device, but it looks relatively ordinary. Hence this piece of
code caught my eye:


        /* Set the doorbell to notify the device */
        btintel_pcie_set_tx_db(data, tfd_index);

Requesting an interrupt. However, are you sure the IO can be processed
and trigger an interrupt only after the PCI write, which this triggers?

        /* Wait for the complete interrupt - URBD0 */
        ret = wait_event_timeout(data->tx_wait_q, data->tx_wait_done,
                                 msecs_to_jiffies(BTINTEL_PCIE_TX_WAIT_TIMEOUT_MS));

	Regards
		Oliver