From: Cédric Le Goater Date: Thu, 1 Jul 2021 13:27:26 +0000 (+0200) Subject: powerpc/pseries/pci: Add a domain_free_irqs() handler X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=07817a578a7a79638537480b8847dc7a12f293c5;p=linux.git 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: Cédric Le Goater Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210701132750.1475580-9-clg@kaod.org --- diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c index 86c6809ebac2c..591cee9cbc9ed 100644 --- a/arch/powerpc/platforms/pseries/msi.c +++ b/arch/powerpc/platforms/pseries/msi.c @@ -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)