Thread (19 messages) 19 messages, 4 authors, 2010-10-13

Re: [MeeGo-Dev][PATCH v3] Topcliff: Update PCH_CAN driver to 2.6.35

From: Wolfgang Grandegger <hidden>
Date: 2010-10-01 12:40:03
Also in: lkml

Possibly related (same subject, not in this thread)

On 10/01/2010 12:02 PM, Masayuki Ohtake wrote:
Hi Wolfgang Grandegger,

Thank you for your comments.

We will modify and re-post ASAP.

I have a comment about below.
quoted
In this driver you are using just *one* RX object. This means that the
CPU must handle new messages as quickly as possible otherwise message
losses will happen, right?. For sure, this will not make user's happy.
Any chance to use more RX objects in FIFO mode?
In case implementing with FIFO mode,
received packets may be our of order.
Hm, FIFO means "First in First out"! It might be tricky to implement,
though.
Because our CAN register access is slow.

I am confirming our CAN HW spec and the possibility of our-of-order.
I don't understand?

Wolfgang.
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