iommu/amd: Add missing spin_lock initialization

commit 2c13d47a1a7ee8808796016c617aef25fd1d1925 upstream.

Add missing spin_lock initialization in
amd_iommu_bind_pasid() function and make lockdep happy
again.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/iommu/amd_iommu_v2.c b/drivers/iommu/amd_iommu_v2.c
index 036fe9bf157e0341862c8452ed47ca02b32db3c3..a1f1bc876043ca17eaab498b105b5e7767846a50 100644 (file)
--- a/drivers/iommu/amd_iommu_v2.c
+++ b/drivers/iommu/amd_iommu_v2.c
@@ -681,6 +681,8 @@ int amd_iommu_bind_pasid(struct pci_dev *pdev, int pasid,
 
        atomic_set(&pasid_state->count, 1);
        init_waitqueue_head(&pasid_state->wq);
+       spin_lock_init(&pasid_state->lock);
+
        pasid_state->task         = task;
        pasid_state->mm           = get_task_mm(task);
        pasid_state->device_state = dev_state;