[PATCH v2 5/5] can: flexcan: Add support for non RX-FIFO mode

Sharma Bhupesh bhupesh.sharma at freescale.com
Thu May 14 08:44:19 PDT 2015

> -----Original Message-----
> From: Marc Kleine-Budde [mailto:mkl at pengutronix.de]
> Sent: Thursday, May 14, 2015 9:12 PM
> To: Sharma Bhupesh-B45370; arnd at arndb.de; linux-can at vger.kernel.org
> Cc: bhupesh.linux at gmail.com; Arora Sakar-B45205; linux-arm-
> kernel at lists.infradead.org
> Subject: Re: [PATCH v2 5/5] can: flexcan: Add support for non RX-FIFO
> mode
> On 05/14/2015 01:33 PM, Bhupesh Sharma wrote:
> > This patch adds support for non RX-FIFO (legacy) mode in the flexcan
> > driver.
> >
> > On certain SoCs, the RX-FIFO support might be broken, as a result we
> > need to fall-back on the legacy (non RX-FIFO) mode to receive CAN
> > frames.
> >
> > Signed-off-by: Bhupesh Sharma <bhupesh.sharma at freescale.com>
> > Signed-off-by: Sakar Arora <Sakar.Arora at freescale.com>
> The non FIFO mode doesn't guarantee the order of the incoming frames, not
> does not even try to...this is not acceptable. I'm currently working on a
> patch by David Jander that brings in non FIFO mode, but tries to keep the
> order of the frames.

That is already WIP at our end. V3 will contain the same change.
If you are already working on it, I don't know how to proceed further
as we had already v1 of this patchset with the non FIFO mode out
since a month or so.


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