Question regarding netif_tx_disable and netif_stop_queue

Hi,

I am writing a device driver for new emac hardware. I have a question regarding
netif_tx_disable and netif_stop_queue.

If the Emac hardware's queue is full and I need to assist the kernel with
stopping the packet scheduling from kernel, which function should
I use, if I am invoking it from outside of hard_start_xmit method?
Probably it will
be from the interrupt context or polling routine. From the review, I
understand that
I should use netif_tx_disable(struct net_device *dev); and not use
netif_stop_queue
(this function is generally used from within hard_start_xmit). I think
netif_tx_disable
is more suitable for SMP environment also, as it takes care for
hard_start_xmit method
is not running on another CPU. But I just would like to make sure about it.

Thanks,
- Keyur