linux-kernel - [ 07/73] iommu/amd: Properly initialize irq-table lock

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Date:	Thu,  9 May 2013 15:31:30 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Shuah Khan <shuahkhan@...il.com>,
	Joerg Roedel <joro@...tes.org>
Subject: [ 07/73] iommu/amd: Properly initialize irq-table lock

3.8-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Joerg Roedel <joro@...tes.org>

commit 197887f03daecdb3ae21bafeb4155412abad3497 upstream.

Fixes a lockdep warning.

Reviewed-by: Shuah Khan <shuahkhan@...il.com>
Signed-off-by: Joerg Roedel <joro@...tes.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/iommu/amd_iommu.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -3948,6 +3948,9 @@ static struct irq_remap_table *get_irq_t
 	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;


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