From: Matthew Rosato <mjrosato@linux.ibm.com>
To: Omar Elghoul <oelghoul@linux.ibm.com>,
linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org
Cc: hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com,
borntraeger@linux.ibm.com, svens@linux.ibm.com,
schnelle@linux.ibm.com, alifm@linux.ibm.com,
farman@linux.ibm.com, gbayer@linux.ibm.com, pasic@linux.ibm.com,
alex@shazbot.org, stable@vger.kernel.org
Subject: Re: [PATCH v6 1/4] s390/pci: Hold fmb_lock when enabling or disabling PCI devices
Date: Wed, 16 Sep 2026 22:21:09 -0400 [thread overview]
Message-ID: <cdd076c4-acff-4390-a87d-6fa03119e913@linux.ibm.com> (raw)
In-Reply-To: <20260916213222.233-2-oelghoul@linux.ibm.com>
On 9/16/26 5:32 PM, Omar Elghoul wrote:
> Ensure that fmb_lock is held by pcibios_enable_device() and
> pcibios_disable_device() when calling zpci_fmb_enable_device() or
> zpci_fmb_disable_device(), respectively. Additionally, assert that the
> fmb_lock is held within the latter two functions to prevent future race
> conditions regarding new callers.
>
> Fixes: af0a8a8453f7 ("s390/pci: implement pcibios_add_device")
> Fixes: 944239c59e93 ("s390/pci: implement pcibios_release_device")
> Cc: stable@vger.kernel.org
> Signed-off-by: Omar Elghoul <oelghoul@linux.ibm.com>
> Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
next prev parent reply other threads:[~2026-09-17 2:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-16 21:32 [PATCH v6 0/4] vfio-pci/zdev: Improved zPCI Function Measurement Support Omar Elghoul
2026-09-16 21:32 ` [PATCH v6 1/4] s390/pci: Hold fmb_lock when enabling or disabling PCI devices Omar Elghoul
2026-09-17 2:21 ` Matthew Rosato [this message]
2026-09-16 21:32 ` [PATCH v6 2/4] s390/pci: Reuse FMB buffer and preserve state in device re-enablement Omar Elghoul
2026-09-17 2:21 ` Matthew Rosato
2026-09-17 13:32 ` Omar Elghoul
2026-09-16 21:32 ` [PATCH v6 3/4] s390/pci: Fence FMB enable/disable via debugfs for passthrough devices Omar Elghoul
2026-09-17 2:23 ` Matthew Rosato
2026-09-16 21:32 ` [PATCH v6 4/4] vfio-pci/zdev: Add VFIO FMB device features Omar Elghoul
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