From: Joerg Roedel <joro@8bytes.org>
Date: Tue, 9 Apr 2013 19:14:08 +0000 (+0200)
Subject: iommu/amd: Properly initialize irq-table lock
X-Git-Tag: v3.8.13~67
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d474ea53485a4a81699f503c8234610af7fb8c3c;p=thirdparty%2Fkernel%2Fstable.git

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>
---

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 4647b50b249ca..4c867f47b53c2 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;