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>

diff --git a/drivers/pci/hotplug/acpiphp_ibm.c b/drivers/pci/hotplug/acpiphp_ibm.c
index 317457d..d0a07d9 100644 (file)
--- a/drivers/pci/hotplug/acpiphp_ibm.c
+++ b/drivers/pci/hotplug/acpiphp_ibm.c
@@ -487,9 +487,7 @@ static void __exit ibm_acpiphp_exit(void)
        if (ACPI_FAILURE(status))
                err("%s: Notification handler removal failed\n", __FUNCTION__);
        /* remove the /sys entries */
-       if (sysfs_remove_bin_file(sysdir, &ibm_apci_table_attr))
-               err("%s: removal of sysfs file apci_table failed\n",
-                               __FUNCTION__);
+       sysfs_remove_bin_file(sysdir, &ibm_apci_table_attr);
 }
 
 module_init(ibm_acpiphp_init);

diff --git a/fs/sysfs/bin.c b/fs/sysfs/bin.c
index c16a93c..98022e4 100644 (file)
--- 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 9889e54..fd7cd5f 100644 (file)
--- 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 3651ffb..6f3d6bd 100644 (file)
--- 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 **);

diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index 1ea5d3c..95f6db5 100644 (file)
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -114,7 +114,7 @@ extern void
 sysfs_remove_link(struct kobject *, const char * name);
 
 int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr);
-int sysfs_remove_bin_file(struct kobject * kobj, struct bin_attribute * attr);
+void sysfs_remove_bin_file(struct kobject *kobj, struct bin_attribute *attr);
 
 int sysfs_create_group(struct kobject *, const struct attribute_group *);
 void sysfs_remove_group(struct kobject *, const struct attribute_group *);