Re: [PATCH] arm64: dts: rockchip: fix PCIe domain number for rk3399

[Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>]

Am Montag, 20. März 2017, 10:38:00 CET schrieb Shawn Lin:
> It's suggested to fix the domain number for all PCIe
> host bridges or not set it at all. However, if we don't
> fix it, the domain number will keep increasing ever when
> doing unbind/bind test, which makes the bus tree of lspci
> introduce pointless domain hierarchy. More investigation shows
> the domain number allocater of PCI doesn't consider the conflict
> of domain number if we have more than one PCIe port belonging to
> different domains. So once unbinding/binding one of them and keep
> others would going to overflow the domain number so that finally
> it will share the same domain as others, but actually it shouldn't.
> We should fix the domain number for PCIe or invent new indexing
> ID mechanisms. However it isn't worth inventing new indexing ID
> mechanisms personlly, Just look at how other Root Complex drivers
> did, for instance, broadcom and qualcomm, it seems fixing the domain
> number was more popular. So this patch gonna fix the domain number
> of PCIe for rk3399.
> 
> Cc: Brian Norris <briannorris-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
> Signed-off-by: Shawn Lin <shawn.lin-TNX95d0MmH7DzftRWevZcw@public.gmane.org>

applied for 4.12 with Brian's tags.


Thanks
Heiko