switch alloc_file() to passing struct path

... and have the caller grab both mnt and dentry; kill
leak in infiniband, while we are at it.

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

1 files changed, 8 insertions, 7 deletions

diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 599b233bef75..5246285a95fb 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -2200,7 +2200,7 @@ pfm_alloc_file(pfm_context_t *ctx)
 {
         struct file *file;
         struct inode *inode;
-        struct dentry *dentry;
+        struct path path;
         char name[32];
         struct qstr this;
 
@@ -2225,18 +2225,19 @@ pfm_alloc_file(pfm_context_t *ctx)
         /*
          * allocate a new dcache entry
          */
-        dentry = d_alloc(pfmfs_mnt->mnt_sb->s_root, &this);
-        if (!dentry) {
+        path.dentry = d_alloc(pfmfs_mnt->mnt_sb->s_root, &this);
+        if (!path.dentry) {
                 iput(inode);
                 return ERR_PTR(-ENOMEM);
         }
+        path.mnt = mntget(pfmfs_mnt);
 
-        dentry->d_op = &pfmfs_dentry_operations;
-        d_add(dentry, inode);
+        path.dentry->d_op = &pfmfs_dentry_operations;
+        d_add(path.dentry, inode);
 
-        file = alloc_file(pfmfs_mnt, dentry, FMODE_READ, &pfm_file_ops);
+        file = alloc_file(&path, FMODE_READ, &pfm_file_ops);
         if (!file) {
-                dput(dentry);
+                path_put(&path);
                 return ERR_PTR(-ENFILE);
         }