Re: [PATCH v4 05/13] iommu/rockchip: Use iopoll helpers to wait for hardware

[JeffyChen]

Hi Robin,

On 01/18/2018 09:09 PM, Robin Murphy wrote:
> > -#define FORCE_RESET_TIMEOUT    100    /* ms */
> > +#define FORCE_RESET_TIMEOUT    100000    /* us */
> > +#define POLL_TIMEOUT        1000    /* us */
>
> Nit: the callsites look a bit odd with the combination of POLL_TIMEOUT
> and the magic number 100 - should we not also define something like
> POLL_PERIOD for that? Also POLL_TIMEOUT is a rather generic name and
> overlaps with several other drivers, so a namespace prefix would be
> helpful (i.e. RK_IOMMU_POLL*, or at least RK_POLL*).
>
> FWIW, my personal preference would be to also suffix these with _US for
> absolute clarity, but it's not essential (especially if longer names
> lead to more linebreaks at the callsites).
right, that make sense, will fix it in next version, thanks :)
> With those undocumented "100"s fixed up,
>
> Reviewed-by: Robin Murphy <robin.murphy@xxxxxxx>