[PATCH] drivers/iommu/tegra: Optimize mutex_unlock function call

[Pushkar Jambhlekar]

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....@gmail.com>
---
 drivers/iommu/tegra-smmu.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

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)
-- 
2.7.4