diff options
| author | Ahmed S. Darwish <darwi@linutronix.de> | 2022-11-11 14:54:58 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2022-11-17 15:15:21 +0100 |
| commit | 18e1926b8c8b7c2249c24057d5f836c578e29f08 (patch) | |
| tree | 700d38a8e174bb3959eade054110e9e0959d51d2 /drivers/pci/msi/api.c | |
| parent | 7b50f62776672e7b328455eddc90ceb01b64ac3e (diff) | |
PCI/MSI: Move pci_disable_msix() to api.c
To disentangle the maze in msi.c, all exported device-driver MSI APIs are
now to be grouped in one file, api.c.
Move pci_disable_msix() and make its kernel-doc comprehensive.
Signed-off-by: Ahmed S. Darwish <darwi@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20221111122015.156785224@linutronix.de
Diffstat (limited to 'drivers/pci/msi/api.c')
| -rw-r--r-- | drivers/pci/msi/api.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/pci/msi/api.c b/drivers/pci/msi/api.c index 83ea38ffa116..20a580bea48f 100644 --- a/drivers/pci/msi/api.c +++ b/drivers/pci/msi/api.c @@ -112,6 +112,30 @@ int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries, EXPORT_SYMBOL(pci_enable_msix_range); /** + * pci_disable_msix() - Disable MSI-X interrupt mode on device + * @dev: the PCI device to operate on + * + * Legacy device driver API to disable MSI-X interrupt mode on device, + * free earlier-allocated interrupt vectors, and restore INTx. + * The PCI device Linux IRQ (@dev->irq) is restored to its default pin + * assertion IRQ. This is the cleanup pair of pci_enable_msix_range(). + * + * NOTE: The newer pci_alloc_irq_vectors() / pci_free_irq_vectors() API + * pair should, in general, be used instead. + */ +void pci_disable_msix(struct pci_dev *dev) +{ + if (!pci_msi_enabled() || !dev || !dev->msix_enabled) + return; + + msi_lock_descs(&dev->dev); + pci_msix_shutdown(dev); + pci_free_msi_irqs(dev); + msi_unlock_descs(&dev->dev); +} +EXPORT_SYMBOL(pci_disable_msix); + +/** * pci_alloc_irq_vectors() - Allocate multiple device interrupt vectors * @dev: the PCI device to operate on * @min_vecs: minimum required number of vectors (must be >= 1) |