sysfs_remove_bin_file: no return value, dump_stack on error

Make sysfs_remove_bin_file() void.  If it detects an error,
printk the file name and call dump_stack().

sysfs_hash_and_remove() now returns an error code indicating
its success or failure so that sysfs_remove_bin_file() can
know success/failure.

Convert the only driver that checked the return value of
sysfs_remove_bin_file().

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 17 insertions, 9 deletions

diff --git a/fs/sysfs/bin.c b/fs/sysfs/bin.c
index c16a93c353c0..98022e41cda1 100644
--- a/fs/sysfs/bin.c
+++ b/fs/sysfs/bin.c
@@ -10,6 +10,7 @@
 
 #include <linux/errno.h>
 #include <linux/fs.h>
+#include <linux/kernel.h>
 #include <linux/kobject.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -176,7 +177,6 @@ const struct file_operations bin_fops = {
  *      sysfs_create_bin_file - create binary file for object.
  *      @kobj:  object.
  *      @attr:  attribute descriptor.
- *
  */
 
 int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr)
@@ -191,13 +191,16 @@ int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr)
  *      sysfs_remove_bin_file - remove binary file for object.
  *      @kobj:  object.
  *      @attr:  attribute descriptor.
- *
  */
 
-int sysfs_remove_bin_file(struct kobject * kobj, struct bin_attribute * attr)
+void sysfs_remove_bin_file(struct kobject * kobj, struct bin_attribute * attr)
 {
-        sysfs_hash_and_remove(kobj->dentry,attr->attr.name);
-        return 0;
+        if (sysfs_hash_and_remove(kobj->dentry, attr->attr.name) < 0) {
+                printk(KERN_ERR "%s: "
+                        "bad dentry or inode or no such file: \"%s\"\n",
+                        __FUNCTION__, attr->attr.name);
+                dump_stack();
+        }
 }
 
 EXPORT_SYMBOL_GPL(sysfs_create_bin_file);
diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
index 9889e54e1f13..fd7cd5f843d2 100644
--- a/fs/sysfs/inode.c
+++ b/fs/sysfs/inode.c
@@ -12,6 +12,7 @@
 #include <linux/namei.h>
 #include <linux/backing-dev.h>
 #include <linux/capability.h>
+#include <linux/errno.h>
 #include "sysfs.h"
 
 extern struct super_block * sysfs_sb;
@@ -234,17 +235,18 @@ void sysfs_drop_dentry(struct sysfs_dirent * sd, struct dentry * parent)
         }
 }
 
-void sysfs_hash_and_remove(struct dentry * dir, const char * name)
+int sysfs_hash_and_remove(struct dentry * dir, const char * name)
 {
         struct sysfs_dirent * sd;
         struct sysfs_dirent * parent_sd;
+        int found = 0;
 
         if (!dir)
-                return;
+                return -ENOENT;
 
         if (dir->d_inode == NULL)
                 /* no inode means this hasn't been made visible yet */
-                return;
+                return -ENOENT;
 
         parent_sd = dir->d_fsdata;
         mutex_lock(&dir->d_inode->i_mutex);
@@ -255,8 +257,11 @@ void sysfs_hash_and_remove(struct dentry * dir, const char * name)
                         list_del_init(&sd->s_sibling);
                         sysfs_drop_dentry(sd, dir);
                         sysfs_put(sd);
+                        found = 1;
                         break;
                 }
         }
         mutex_unlock(&dir->d_inode->i_mutex);
+
+        return found ? 0 : -ENOENT;
 }
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index 3651ffb5ec09..6f3d6bd52887 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -10,7 +10,7 @@ extern int sysfs_make_dirent(struct sysfs_dirent *, struct dentry *, void *,
                                 umode_t, int);
 
 extern int sysfs_add_file(struct dentry *, const struct attribute *, int);
-extern void sysfs_hash_and_remove(struct dentry * dir, const char * name);
+extern int sysfs_hash_and_remove(struct dentry * dir, const char * name);
 extern struct sysfs_dirent *sysfs_find(struct sysfs_dirent *dir, const char * name);
 
 extern int sysfs_create_subdir(struct kobject *, const char *, struct dentry **);