Re: What are you doing if the TX buffer overflows?

[Marc Kleine-Budde <mkl@pengutronix.de>]

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On 09/18/2012 02:49 PM, Wolfgang Grandegger wrote:
[...]

>> We have several customers who asked how to abort pending TX messages,
>> too. Which involves:
>> a) clear the TX-queue in Linux
>> b) clear queue in hardware
>> c) abort currently transmitting CAN frame
>>
>> I think c) would be a usecase of its own, too.
> 
> I think you need c) for b), at least for some controllers. These

Yes, if it's a hardware limitation so be it. But if we design an
interface it should support "clear everything" (a+b+c), but also just
only c.

> features, especially b) and c), are not yet available because they are
> not easy to implement (hardware-dependent) and there was no request so
> far.

Sure, this is why I'm coming up with this topic.

> Anyway, clearing the TX queue should be rather common and might
> already be available for other protocols.

Does anyone know?

Marc
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