Re: [PATCH] PCI/hotplug: Replaced down_write_nested with hotplug_slot_rwsem if ctrl->depth > 0 when taking the ctrl->reset_lock.

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On Mon, Feb 13, 2023 at 09:59:52AM -0500, Anatoli Antonovitch wrote:
> Hi Lukas,
> 
> Can we revisit the patches again to get a fix?
> The issue still reproduce and visible in the kernel 6.2.0-rc8.

> On 2023-01-23 14:30, Anatoli Antonovitch wrote:
> > I do not see a deadlock, when applying the following old patch:
> > https://lore.kernel.org/linux-pci/908047f7699d9de9ec2efd6b79aa752d73dab4b6.1595329748.git.lukas@xxxxxxxxx/

This old patch would need to be updated and reposted.  There was a
0-day bot issue and a question to be resolved.  Maybe this is all
already resolved, but it needs to be posted and tested with a current
kernel.

> > after merge for the kernel 6.2.0-rc5, and applied the alternative patch:
> > https://patchwork.kernel.org/project/linux-pci/patch/3dc88ea82bdc0e37d9000e413d5ebce481cbd629.1674205689.git.lukas@xxxxxxxxx/

This one is on track to appear in v6.3-rc1:
https://git.kernel.org/cgit/linux/kernel/git/pci/pci.git/commit/?id=74ff8864cc84

> > I have uploaded the merged patch and the system log for the upstream
> > kernel.
> > 
> > Anatoli
> > 
> > 
> > On 2023-01-21 02:21, Lukas Wunner wrote:
> > > You're now getting a different deadlock. That one is addressed by this
> > > old patch (it's already linked from the bugzilla):
> > > 
> > > https://lore.kernel.org/linux-pci/908047f7699d9de9ec2efd6b79aa752d73dab4b6.1595329748.git.lukas@xxxxxxxxx/
> > > 
> > > 
> > > If you apply that patch plus the new one, do you still see a deadlock?



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