[vortex-bug] Re: Polling mode race fixed

[Andrew Morton]

Bogdan Costescu wrote:
> 
> 3. a mechanism that prevents the Tx ring to be re-filled completely at any
> time. The mechanism that Don introduced in his drivers where the Tx ring
> is never completely full is good for this purpose; however, TX_QUEUE_LEN
> must always be smaller (not equal) to TX_RING_SIZE in order for this
> mechanism to function properly.

Why is the introduction of TX_QUEUE_LEN a problem?

I don't understand why TX_QUEUE_LEN was introduced in the first
place.