[xen staging] xen/hypfs: pass real failure reason up from hypfs_get_entry()

[patchbot@xxxxxxx]

commit f1b920bb06c6fb3bdad8a483fb6ecf5c76069799
Author:     Juergen Gross <jgross@xxxxxxxx>
AuthorDate: Fri Dec 4 08:30:17 2020 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Dec 4 08:30:17 2020 +0100

    xen/hypfs: pass real failure reason up from hypfs_get_entry()
    
    Instead of handling all errors from hypfs_get_entry() as ENOENT pass
    up the real error value via ERR_PTR().
    
    Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/common/hypfs.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/xen/common/hypfs.c b/xen/common/hypfs.c
index 7befd144ba..fdfd0f764a 100644
--- a/xen/common/hypfs.c
+++ b/xen/common/hypfs.c
@@ -187,7 +187,7 @@ static struct hypfs_entry *hypfs_get_entry_rel(struct 
hypfs_entry_dir *dir,
     while ( again )
     {
         if ( dir->e.type != XEN_HYPFS_TYPE_DIR )
-            return NULL;
+            return ERR_PTR(-ENOENT);
 
         if ( !*path )
             return &dir->e;
@@ -206,7 +206,7 @@ static struct hypfs_entry *hypfs_get_entry_rel(struct 
hypfs_entry_dir *dir,
                                                      struct hypfs_entry_dir, 
e);
 
             if ( cmp < 0 )
-                return NULL;
+                return ERR_PTR(-ENOENT);
             if ( !cmp && strlen(entry->name) == name_len )
             {
                 if ( !*end )
@@ -221,13 +221,13 @@ static struct hypfs_entry *hypfs_get_entry_rel(struct 
hypfs_entry_dir *dir,
         }
     }
 
-    return NULL;
+    return ERR_PTR(-ENOENT);
 }
 
 static struct hypfs_entry *hypfs_get_entry(const char *path)
 {
     if ( path[0] != '/' )
-        return NULL;
+        return ERR_PTR(-EINVAL);
 
     return hypfs_get_entry_rel(&hypfs_root, path + 1);
 }
@@ -454,9 +454,9 @@ long do_hypfs_op(unsigned int cmd,
         goto out;
 
     entry = hypfs_get_entry(path);
-    if ( !entry )
+    if ( IS_ERR(entry) )
     {
-        ret = -ENOENT;
+        ret = PTR_ERR(entry);
         goto out;
     }
 
--
generated by git-patchbot for /home/xen/git/xen.git#staging