tegra: don't wank with d_find_alias()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 3 insertions, 9 deletions

diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index 7db150ca163e..9a09274d15a7 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -1026,15 +1026,11 @@ static ssize_t smmu_debugfs_stats_write(struct file *file,
 
 static int smmu_debugfs_stats_show(struct seq_file *s, void *v)
 {
-        struct smmu_debugfs_info *info;
-        struct smmu_device *smmu;
-        struct dentry *dent;
+        struct smmu_debugfs_info *info = s->private;
+        struct smmu_device *smmu = info->smmu;
         int i;
         const char * const stats[] = { "hit", "miss", };
 
-        dent = d_find_alias(s->private);
-        info = dent->d_inode->i_private;
-        smmu = info->smmu;
 
         for (i = 0; i < ARRAY_SIZE(stats); i++) {
                 u32 val;
@@ -1048,14 +1044,12 @@ static int smmu_debugfs_stats_show(struct seq_file *s, void *v)
                         stats[i], val, offs);
         }
         seq_printf(s, "\n");
-        dput(dent);
-
         return 0;
 }
 
 static int smmu_debugfs_stats_open(struct inode *inode, struct file *file)
 {
-        return single_open(file, smmu_debugfs_stats_show, inode);
+        return single_open(file, smmu_debugfs_stats_show, inode->i_private);
 }
 
 static const struct file_operations smmu_debugfs_stats_fops = {