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powerpc/pseries/pci: Add a domain_free_irqs() handler

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The RTAS firmware can not disable one MSI at a time. It's all or
nothing. We need a custom free IRQ handler for that.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210701132750.1475580-9-clg@kaod.org
This commit is contained in:
Cédric Le Goater 2021-07-01 15:27:26 +02:00 committed by Michael Ellerman
parent 292145a6e5
commit 07817a578a
1 changed files with 16 additions and 0 deletions
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16
arch/powerpc/platforms/pseries/msi.c
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@ -529,8 +529,24 @@ static int pseries_msi_ops_prepare(struct irq_domain *domain, struct device *dev
return rtas_prepare_msi_irqs(pdev, nvec, type, arg);
}
/*
* RTAS can not disable one MSI at a time. It's all or nothing. Do it
* at the end after all IRQs have been freed.
*/
static void pseries_msi_domain_free_irqs(struct irq_domain *domain,
struct device *dev)
{
if (WARN_ON_ONCE(!dev_is_pci(dev)))
return;
__msi_domain_free_irqs(domain, dev);
rtas_disable_msi(to_pci_dev(dev));
}
static struct msi_domain_ops pseries_pci_msi_domain_ops = {
.msi_prepare = pseries_msi_ops_prepare,
.domain_free_irqs = pseries_msi_domain_free_irqs,
};
static void pseries_msi_shutdown(struct irq_data *d)