linux-kernel - Re: [PATCH 0/1] arm64: dts: rockchip: rk3568: Move PCIe3 MSI to use GIC ITS

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Message-Id: <20250512070009.336989-1-amadeus@jmu.edu.cn>
Date: Mon, 12 May 2025 15:00:09 +0800
From: Chukun Pan <amadeus@....edu.cn>
To: didi.debian@...ow.org
Cc: amadeus@....edu.cn,
	conor+dt@...nel.org,
	devicetree@...r.kernel.org,
	dsimic@...jaro.org,
	heiko@...ech.de,
	krzk+dt@...nel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH 0/1] arm64: dts: rockchip: rk3568: Move PCIe3 MSI to use GIC ITS

Hi,

> > With this patch I get the following kernel warnings:
> >
> > pci 0001:10:00.0: Primary bus is hard wired to 0
> > pci 0002:20:00.0: Primary bus is hard wired to 0
> >
> > If I 'unapply' this patch, I don't see those warnings.

> I was pretty sure I had seen those messages before, but couldn't find
> them before. But now I have: on my rk3588-rock-5b.

Thanks for the reminder, I didn't notice this before.
The BSP kernel also has this warning.

Before this patch:
[    2.997725] pci_bus 0001:01: busn_res: can not insert [bus 01-ff] under [bus 00-0f] (conflicts with (null) [bus 00-0f])
[    3.009990] pci 0001:00:00.0: BAR 6: assigned [mem 0xf2200000-0xf220ffff pref]
[    3.018100] pci 0001:00:00.0: PCI bridge to [bus 01-ff]
...
[    3.401416] pci_bus 0002:01: busn_res: can not insert [bus 01-ff] under [bus 00-0f] (conflicts with (null) [bus 00-0f])
...
[    3.545459] pci 0002:00:00.0: PCI bridge to [bus 01-ff]

After this patch:
[    3.037779] pci 0001:10:00.0: Primary bus is hard wired to 0
[    3.044120] pci 0001:10:00.0: bridge configuration invalid ([bus 01-ff]), reconfiguring
[    3.053362] pci_bus 0001:11: busn_res: [bus 11-1f] end is updated to 11
[    3.068920] pci 0001:10:00.0: PCI bridge to [bus 11]
...
[    3.451429] pci 0002:20:00.0: Primary bus is hard wired to 0
[    3.457793] pci 0002:20:00.0: bridge configuration invalid ([bus 01-ff]), reconfiguring
...
[    3.535794] pci_bus 0002:21: busn_res: [bus 21-2f] end is updated to 21
...
[    3.612893] pci 0002:20:00.0: PCI bridge to [bus 21]

Looks like a harmless warning.

Thanks,
Chukun

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2.25.1