[PATCH] iommu/vt-d: Unlock on error paths

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

There were a couple places where we need to unlock before returning.

Fixes: 91391b919e19 ("iommu/vt-d: Populate debugfs if IOMMUs are detected")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
 drivers/iommu/intel-iommu-debugfs.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/intel-iommu-debugfs.c b/drivers/iommu/intel-iommu-debugfs.c
index 8d24c4d85cc2..6a495b103972 100644
--- a/drivers/iommu/intel-iommu-debugfs.c
+++ b/drivers/iommu/intel-iommu-debugfs.c
@@ -289,11 +289,12 @@ static int dmar_translation_struct_show(struct seq_file *m, void *unused)
 		sts = dmar_readl(iommu->reg + DMAR_GSTS_REG);
 		if (!(sts & DMA_GSTS_TES)) {
 			seq_puts(m, "DMA Remapping is not enabled\n");
-			return 0;
+			goto unlock;
 		}
 		root_tbl_walk(m, iommu);
 		seq_putc(m, '\n');
 	}
+unlock:
 	rcu_read_unlock();
 
 	return 0;
@@ -444,7 +445,7 @@ static int ir_translation_struct_show(struct seq_file *m, void *unused)
 		sts = dmar_readl(iommu->reg + DMAR_GSTS_REG);
 		if (!(sts & DMA_GSTS_IRES)) {
 			seq_puts(m, "Interrupt Remapping is not enabled\n");
-			return 0;
+			goto unlock;
 		}
 
 		if (iommu->ir_table) {
@@ -475,6 +476,7 @@ static int ir_translation_struct_show(struct seq_file *m, void *unused)
 		}
 		seq_putc(m, '\n');
 	}
+unlock:
 	rcu_read_unlock();
 
 	return 0;
-- 
2.20.1