On 02/06/2017 05:59 PM, David Miller wrote: > Sure but what about these "can_rx_offload_le()" comparisons?
This is to scan the mailboxes according to priority. On some CAN IP
cores the mailboxes decrease in priority (0=high, 63=low) some increase
(63=high, 0=low). The can_rx_offload_le() (le means less or equal) and
can_rx_offload_inc() functions are used to abstract the order. We always
only scan from highest to lower prio (offload->mb_first ...
offload->mb_last):
> for (i = offload->mb_first;
> can_rx_offload_le(offload, i, offload->mb_last);
> can_rx_offload_inc(offload, &i)) {
So we never wrap around.
Marc
--
Pengutronix e.K. | Marc Kleine-Budde |
Industrial Linux Solutions | Phone: +49-231-2826-924 |
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