Re: [PATCH v2 2/4] PCI/MSI: Add startup/shutdown for per device domains
From: Inochi Amaoto
Date: Wed Aug 27 2025 - 06:16:33 EST
On Wed, Aug 27, 2025 at 05:39:11PM +0800, Wei Fang wrote:
> We found an issue that the ENETC network port of our i.MX95 platform
> (arm64) does not work based the latest linux-next tree. According to
> my observation, the MSI-X interrupts statistics from
> "cat /proc/interrupts" are all 0.
>
> root@imx95evk:~# cat /proc/interrupts | grep eth0
> 123: 0 0 0 0 0 0 ITS-PCI-MSIX-0002:00:00.0 1 Edge eth0-rxtx0
> 124: 0 0 0 0 0 0 ITS-PCI-MSIX-0002:00:00.0 2 Edge eth0-rxtx1
> 125: 0 0 0 0 0 0 ITS-PCI-MSIX-0002:00:00.0 3 Edge eth0-rxtx2
> 126: 0 0 0 0 0 0 ITS-PCI-MSIX-0002:00:00.0 4 Edge eth0-rxtx3
> 127: 0 0 0 0 0 0 ITS-PCI-MSIX-0002:00:00.0 5 Edge eth0-rxtx4
> 128: 0 0 0 0 0 0 ITS-PCI-MSIX-0002:00:00.0 6 Edge eth0-rxtx5
>
>
> So I reverted this patch and then the MSI-X interrupts return to normal.
>
> root@imx95evk:~# cat /proc/interrupts | grep eth0
> 123: 4365 0 0 0 0 0 ITS-PCI-MSIX-0002:00:00.0 1 Edge eth0-rxtx0
> 124: 0 194 0 0 0 0 ITS-PCI-MSIX-0002:00:00.0 2 Edge eth0-rxtx1
> 125: 0 0 227 0 0 0 ITS-PCI-MSIX-0002:00:00.0 3 Edge eth0-rxtx2
> 126: 0 0 0 219 0 0 ITS-PCI-MSIX-0002:00:00.0 4 Edge eth0-rxtx3
> 127: 0 0 0 0 176 0 ITS-PCI-MSIX-0002:00:00.0 5 Edge eth0-rxtx4
> 128: 0 0 0 0 0 233 ITS-PCI-MSIX-0002:00:00.0 6 Edge eth0-rxtx5
>
> It looks like that this patch causes this issue, but I don't know about
> the PCI MSI driver, so please help investigate this issue, thanks.
>
Can you try the following patch?
https://lore.kernel.org/all/20250827062911.203106-1-inochiama@xxxxxxxxx/
Regards,
Inochi