Subject: Re: [bisected][mainline]Kernel OOPs at msi_desc_to_pci_dev

From: Nam Cao <[email-masked]>
Date: Wed, 08 Oct 2025 14:42:22 +0200

Venkat Rao Bagalkote <[email-masked]> writes:
> IBM CI has reported a kernel crash while running module load and unload 
> testing on lpfc driver.

Thanks for the report.

I trust the below patch should fix the issue?

diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c
index 825f9432e03d..a82aaa786e9e 100644
--- a/arch/powerpc/platforms/pseries/msi.c
+++ b/arch/powerpc/platforms/pseries/msi.c
@@ -443,8 +443,7 @@ static int pseries_msi_ops_prepare(struct irq_domain *domain, struct device *dev
  */
 static void pseries_msi_ops_teardown(struct irq_domain *domain, msi_alloc_info_t *arg)
 {
-	struct msi_desc *desc = arg->desc;
-	struct pci_dev *pdev = msi_desc_to_pci_dev(desc);
+	struct pci_dev *pdev = to_pci_dev(domain->dev);
 
 	rtas_disable_msi(pdev);
 }