drivers/iommu/tegra: Optimize mutex_unlock function call

Message ID 1504677037-3224-1-git-send-email-pushkar.iit@gmail.com
State New
Headers show
Series
  • drivers/iommu/tegra: Optimize mutex_unlock function call
Related show

Commit Message

Pushkar Jambhlekar Sept. 6, 2017, 5:50 a.m.
Code can be optimized more by making single exit point of function and calling mutex_unlock at the end

Signed-off-by: Pushkar Jambhlekar <pushkar.iit@gmail.com>
---
 drivers/iommu/tegra-smmu.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

Patch

diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index 3b6449e..da38833 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -232,20 +232,22 @@  static inline void smmu_flush(struct tegra_smmu *smmu)
 static int tegra_smmu_alloc_asid(struct tegra_smmu *smmu, unsigned int *idp)
 {
 	unsigned long id;
+	int ret = 0;
 
 	mutex_lock(&smmu->lock);
 
 	id = find_first_zero_bit(smmu->asids, smmu->soc->num_asids);
 	if (id >= smmu->soc->num_asids) {
-		mutex_unlock(&smmu->lock);
-		return -ENOSPC;
+		ret = -ENOSPC;
+		goto Exit;
 	}
 
 	set_bit(id, smmu->asids);
 	*idp = id;
 
+Exit:
 	mutex_unlock(&smmu->lock);
-	return 0;
+	return ret;
 }
 
 static void tegra_smmu_free_asid(struct tegra_smmu *smmu, unsigned int id)