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 4647b50b249ca2a0ab8abbbf5f58adff70ed037b..4c867f47b53c2d97069811bdf57e13d2e647850c 100644 (file)
--- 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;