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PCI/MSI: Simplify pci_irq_get_affinity()

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Replace open coded MSI descriptor chasing and use the proper accessor
functions instead.

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>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221814.900929381@linutronix.de
This commit is contained in:
Thomas Gleixner 2021-12-10 23:19:26 +01:00
parent 82ff8e6b78
commit f482359001
1 changed files with 10 additions and 16 deletions
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26
drivers/pci/msi/msi.c
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@ -1104,26 +1104,20 @@ EXPORT_SYMBOL(pci_irq_vector);
*/
const struct cpumask *pci_irq_get_affinity(struct pci_dev *dev, int nr)
{
if (dev->msix_enabled) {
struct msi_desc *entry;
int irq = pci_irq_vector(dev, nr);
struct msi_desc *desc;
for_each_pci_msi_entry(entry, dev) {
if (entry->msi_index == nr)
return &entry->affinity->mask;
}
WARN_ON_ONCE(1);
if (WARN_ON_ONCE(irq <= 0))
return NULL;
} else if (dev->msi_enabled) {
struct msi_desc *entry = first_pci_msi_entry(dev);
if (WARN_ON_ONCE(!entry || !entry->affinity ||
nr >= entry->nvec_used))
return NULL;
return &entry->affinity[nr].mask;
} else {
desc = irq_get_msi_desc(irq);
/* Non-MSI does not have the information handy */
if (!desc)
return cpu_possible_mask;
}
if (WARN_ON_ONCE(!desc->affinity))
return NULL;
return &desc->affinity[nr].mask;
}
EXPORT_SYMBOL(pci_irq_get_affinity);