Re: [patch V3 28/35] PCI/MSI: Simplify pci_irq_get_affinity()
From: Cédric Le Goater <clg@kaod.org>
Date: 2021-12-18 20:42:25
Also in:
dmaengine, linux-iommu, linux-pci, linuxppc-dev, lkml, xen-devel
On 12/18/21 11:25, Thomas Gleixner wrote:
On Fri, Dec 17 2021 at 15:30, Nathan Chancellor wrote:quoted
On Fri, Dec 10, 2021 at 11:19:26PM +0100, Thomas Gleixner wrote: I just bisected a boot failure on my AMD test desktop to this patch as commit f48235900182 ("PCI/MSI: Simplify pci_irq_get_affinity()") in -next. It looks like there is a problem with the NVMe drive after this change according to the logs. Given that the hard drive is not getting mounted for journald to write logs to, I am not really sure how to get them from the machine so I have at least taken a picture of what I see on my screen; open to ideas on that front!Bah. Fix below.
That's a fix for the issue I was seeing on pseries with NVMe. Tested-by: Cédric Le Goater <clg@kaod.org> Thanks, C.
quoted hunk ↗ jump to hunk
Thanks, tglx ---diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c index 71802410e2ab..9b4910befeda 100644 --- a/drivers/pci/msi/msi.c +++ b/drivers/pci/msi/msi.c@@ -1100,7 +1100,7 @@ EXPORT_SYMBOL(pci_irq_vector); */ const struct cpumask *pci_irq_get_affinity(struct pci_dev *dev, int nr) { - int irq = pci_irq_vector(dev, nr); + int idx, irq = pci_irq_vector(dev, nr); struct msi_desc *desc; if (WARN_ON_ONCE(irq <= 0))@@ -1113,7 +1113,10 @@ const struct cpumask *pci_irq_get_affinity(struct pci_dev *dev, int nr) if (WARN_ON_ONCE(!desc->affinity)) return NULL; - return &desc->affinity[nr].mask; + + /* MSI has a mask array in the descriptor. */ + idx = dev->msi_enabled ? nr : 0; + return &desc->affinity[idx].mask; } EXPORT_SYMBOL(pci_irq_get_affinity);
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