[PATCH 08/31] powerpc/pseries/pci: Add a domain_free_irqs handler
From: Cédric Le Goater <clg@kaod.org>
Date: 2021-04-30 08:11:57
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
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. Cc: Thomas Gleixner <redacted> Signed-off-by: Cédric Le Goater <clg@kaod.org> --- arch/powerpc/platforms/pseries/msi.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c
index a9bd1e991df5..a41c448520d4 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)
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2.26.3