linux-kernel - [PATCH] genirq/msi: fix populating multiple interrupts

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Message-Id: <20170905171208.17102-1-john@metanate.com>
Date:   Tue,  5 Sep 2017 18:12:08 +0100
From:   John Keeping <john@...anate.com>
To:     Marc Zyngier <marc.zyngier@....com>
Cc:     Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org,
        John Keeping <john@...anate.com>
Subject: [PATCH] genirq/msi: fix populating multiple interrupts

Use the correct variable to set up each interrupt in turn rather than
configuring the first interrupt "nvec" times.

Signed-off-by: John Keeping <john@...anate.com>
---
 kernel/irq/msi.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index 48eadf416c24..3fa4bd59f569 100644
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -315,11 +315,12 @@ int msi_domain_populate_irqs(struct irq_domain *domain, struct device *dev,
 
 		ops->set_desc(arg, desc);
 		/* Assumes the domain mutex is held! */
-		ret = irq_domain_alloc_irqs_hierarchy(domain, virq, 1, arg);
+		ret = irq_domain_alloc_irqs_hierarchy(domain, desc->irq, 1,
+						      arg);
 		if (ret)
 			break;
 
-		irq_set_msi_desc_off(virq, 0, desc);
+		irq_set_msi_desc_off(desc->irq, 0, desc);
 	}
 
 	if (ret) {
-- 
2.14.1