linux-kernel - Re: [bug report][PPC]: rmod nvme driver causes the kernel panic

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Message-ID: <01f7b9fc-7398-4a28-ae78-e7b4e1c6ca0f@linux.ibm.com>
Date: Mon, 13 Oct 2025 15:58:43 +0530
From: Nilay Shroff <nilay@...ux.ibm.com>
To: Nam Cao <namcao@...utronix.de>
Cc: maddy@...ux.ibm.com, mpe@...erman.id.au, npiggin@...il.com,
        christophe.leroy@...roup.eu, tglx@...utronix.de, maz@...nel.org,
        gautam@...ux.ibm.com, linuxppc-dev@...ts.ozlabs.org,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        "linux-nvme@...ts.infradead.org" <linux-nvme@...ts.infradead.org>
Subject: Re: [bug report][PPC]: rmod nvme driver causes the kernel panic



On 10/13/25 3:30 PM, Nam Cao wrote:
> Nilay Shroff <nilay@...ux.ibm.com> writes:
>> Hi Nam,
> Hi Nilay,
> 
>> On the latest upstream mainline kernel, I am encountering a kernel
>> crash when attempting to unload the NVMe driver module (rmmod nvme)
>> on a POWER9 system. The crash appears to be triggered by the recent
>> work on using MSI parent domains, discussed here: 
>> https://lore.kernel.org/all/cover.1754903590.git.namcao@linutronix.de/
> 
> Thanks for the detailed analysis. This should be fixed by:
> https://lore.kernel.org/linuxppc-dev/20251010120307.3281720-1-namcao@linutronix.de/T/#u
> 
> which currently is in powerpc/fixes-test

Thanks for the fix! This works well... 

--Nilay