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From:   Lorenzo Pieralisi <lpieralisi@kernel.org>
To:     tglx@linutronix.de, jgg@ziepe.ca, bhelgaas@google.com,
        haiyangz@microsoft.com, kw@linux.com, kys@microsoft.com,
        linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org,
        mikelley@microsoft.com, robh@kernel.org, wei.liu@kernel.org,
        helgaas@kernel.org, Dexuan Cui <decui@microsoft.com>
Cc:     Lorenzo Pieralisi <lpieralisi@kernel.org>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] PCI: hv: Fix a crash in hv_pci_restore_msi_msg() during hibernation
Date:   Tue, 22 Aug 2023 15:06:16 +0200
Message-Id: <169270956288.17505.3353115322149468320.b4-ty@kernel.org>
In-Reply-To: <20230816175939.21566-1-decui@microsoft.com>
References: <20230816175939.21566-1-decui@microsoft.com>
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On Wed, 16 Aug 2023 10:59:39 -0700, Dexuan Cui wrote:
> When a Linux VM with an assigned PCI device runs on Hyper-V, if the PCI
> device driver is not loaded yet (i.e. MSI-X/MSI is not enabled on the
> device yet), doing a VM hibernation triggers a panic in
> hv_pci_restore_msi_msg() -> msi_lock_descs(&pdev->dev), because
> pdev->dev.msi.data is still NULL.
> 
> Avoid the panic by checking if MSI-X/MSI is enabled.
> 
> [...]

Applied to controller/hv, thanks!

[1/1] PCI: hv: Fix a crash in hv_pci_restore_msi_msg() during hibernation
      https://git.kernel.org/pci/pci/c/04bbe863241a

Thanks,
Lorenzo