[rtl] interrupt latency

[Kay-Ulrich Scholl <scholl@fzi.de>]

Hi,
we use a passive Can-Controller-Card to communicate with some
C167-Microcontrollers.
With linux-versione 2.0.33 (suse) and rtl 0.6 everything worked fine.
No we changed to linux 2.0.35 (debian) and rtl 0.9G and many
CAN-messages
are lost, because the routine, which gets the CAN-messages is not fast
enough to get a message before the next arrives. This routine is
interrupt-driven (IRQ 7).
I didn't change anything on the code. We just use other versions and
now we have this problem. 
Are the interrupt latency timings now less good than before.

Kay 
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