From d474ea53485a4a81699f503c8234610af7fb8c3c Mon Sep 17 00:00:00 2001
From: Joerg Roedel <joro@8bytes.org>
Date: Tue, 9 Apr 2013 21:14:08 +0200
Subject: [PATCH] iommu/amd: Properly initialize irq-table lock

commit 197887f03daecdb3ae21bafeb4155412abad3497 upstream.

Fixes a lockdep warning.

Reviewed-by: Shuah Khan <shuahkhan@gmail.com>
Signed-off-by: Joerg Roedel <joro@8bytes.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iommu/amd_iommu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 4647b50b249..4c867f47b53 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -3948,6 +3948,9 @@ static struct irq_remap_table *get_irq_table(u16 devid, bool ioapic)
 	if (!table)
 		goto out;
 
+	/* Initialize table spin-lock */
+	spin_lock_init(&table->lock);
+
 	if (ioapic)
 		/* Keep the first 32 indexes free for IOAPIC interrupts */
 		table->min_index = 32;
-- 
2.34.1