Commit 07817a57 authored by Cédric Le Goater's avatar Cédric Le Goater Committed by Michael Ellerman
Browse files

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



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: default avatarCédric Le Goater <clg@kaod.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210701132750.1475580-9-clg@kaod.org
parent 292145a6

arch/powerpc/platforms/pseries/msi.c

+16 −0
Original line number Diff line number Diff line
@@ -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)