[ECOS] bugs in AT91 Ethernet driver

I-Yanaslov yanaslov_iv@ic-bresler.ru
Sat May 31 11:51:00 GMT 2008


> However, you are wrong about the TX buffers being on the heap. The
> buffer is inside the at91_eth_priv_t structure. This is allocated at
> the end of if_at91.c. It will be placed in the data segment.

at91_eth_priv structure is contains only RX buffers, RX buffer descriptors 
and "TX buffer descriptors". No contains "TX buffers".

at91_eth_send() shows " priv->tbd[priv->curr_tbd_idx].addr = sg_list[i].buf; 
" - no memory copy, only address assigment.
But, sg_list[] it is mbuf, dynamically allocated in TCP/IP stack.

Present at91_eth driver is don't use static TX buffers.

Ivan. 


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