Re: [PATCH v2 1/2] net, can, ifi: fix "write buffer full" error

[Marc Kleine-Budde]

On 02/08/2018 07:47 AM, Heiko Schocher wrote:
> the driver reads in the ISR first the IRQpending register,
> and clears after that in a write *all* bits in it.
> 
> It could happen that the isr register raise bits between
> this 2 register accesses, which leads in lost bits ...
> 
> In case it clears "TX message sent successfully", the driver
> never sends any Tx data, and buffers to userspace run over.
> 
> Fixed this:
> clear only the bits in the IRQpending register, the
> driver had read.
> 
> Signed-off-by: Heiko Schocher <hs@xxxxxxx>
> Reviewed-by: Marek Vasut <marex@xxxxxxx>

Applied both to linux-can.

Tnx,
Marc

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