iommu/amd/pgtbl_v2: Take protection domain lock before invalidating TLB

Commit c7fc123 ("iommu/amd/pgtbl_v2: Invalidate updated page ranges
only") missed to take domain lock before calling
amd_iommu_domain_flush_pages(). Fix this by taking protection domain
lock before calling TLB invalidation function.

Fixes: c7fc123 ("iommu/amd/pgtbl_v2: Invalidate updated page ranges only")
Signed-off-by: Vasant Hegde <[email protected]>
Reviewed-by: Jason Gunthorpe <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Joerg Roedel <[email protected]>

Author: hegdevasant

drivers/iommu/amd/io_pgtable_v2.c

@@ -268,8 +268,11 @@ static int iommu_v2_map_pages(struct io_pgtable_ops *ops, unsigned long iova,
 out:
 	if (updated) {
 		struct protection_domain *pdom = io_pgtable_ops_to_domain(ops);
+		unsigned long flags;
 
+		spin_lock_irqsave(&pdom->lock, flags);
 		amd_iommu_domain_flush_pages(pdom, o_iova, size);
+		spin_unlock_irqrestore(&pdom->lock, flags);
 	}
 
 	if (mapped)