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PCI/MSI: Allocate MSI device data on first use
Allocate MSI device data on first use, i.e. when a PCI driver invokes one of the PCI/MSI enablement functions. Add a wrapper function to ensure that the ordering vs. pcim_msi_release() is correct. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Michael Kelley <mikelley@microsoft.com> Tested-by: Nishanth Menon <nm@ti.com> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/87r1adrdje.ffs@tglx
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parent
3f35d2cf9f
commit
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1 changed files with 15 additions and 2 deletions
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@ -366,6 +366,19 @@ static int pcim_setup_msi_release(struct pci_dev *dev)
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return ret;
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}
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/*
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* Ordering vs. devres: msi device data has to be installed first so that
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* pcim_msi_release() is invoked before it on device release.
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*/
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static int pci_setup_msi_context(struct pci_dev *dev)
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{
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int ret = msi_setup_device_data(&dev->dev);
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if (!ret)
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ret = pcim_setup_msi_release(dev);
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return ret;
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}
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static struct msi_desc *
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msi_setup_entry(struct pci_dev *dev, int nvec, struct irq_affinity *affd)
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{
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@ -909,7 +922,7 @@ static int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec,
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if (nvec > maxvec)
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nvec = maxvec;
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rc = pcim_setup_msi_release(dev);
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rc = pci_setup_msi_context(dev);
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if (rc)
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return rc;
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@ -956,7 +969,7 @@ static int __pci_enable_msix_range(struct pci_dev *dev,
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if (WARN_ON_ONCE(dev->msix_enabled))
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return -EINVAL;
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rc = pcim_setup_msi_release(dev);
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rc = pci_setup_msi_context(dev);
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if (rc)
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return rc;
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