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 <t...@linutronix.de>
Signed-off-by: Cédric Le Goater <c...@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)
--
2.26.3
