linux-kernel - Re: [PATCH v2 2/4] PCI/MSI: Add startup/shutdown for per device domains

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <zxtgpccewso6evf6zpchy62oyfjasxyszf7exqnd374ax6ufis@y4fiyftxauop>
Date: Wed, 27 Aug 2025 18:14:30 +0800
From: Inochi Amaoto <inochiama@...il.com>
To: Wei Fang <wei.fang@....com>, inochiama@...il.com
Cc: Jonathan.Cameron@...ei.com, bhelgaas@...gle.com, dlan@...too.org, 
	haiyangz@...rosoft.com, jgg@...pe.ca, jgross@...e.com, linux-kernel@...r.kernel.org, 
	linux-pci@...r.kernel.org, looong.bin@...il.com, lpieralisi@...nel.org, maz@...nel.org, 
	nicolinc@...dia.com, shradhagupta@...ux.microsoft.com, tglx@...utronix.de, 
	unicorn_wang@...look.com
Subject: Re: [PATCH v2 2/4] PCI/MSI: Add startup/shutdown for per device
 domains

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@...95evk:~# 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@...95evk:~# 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@gmail.com/

Regards,
Inochi