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authorLinus Torvalds <torvalds@linux-foundation.org>2012-04-12 15:34:33 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-04-12 15:34:33 -0700
commitf5ad50100680bfe7d2702d2487d303ee122bf5f7 (patch)
tree2d43dc7098d556a21b0445c02082b7c32093f080 /fs
parentb3dfd76c945b879513b991bac23ffcb97fe88ec2 (diff)
parent282029c005e65ffdce3aa9f8220f88a8bbbc4dae (diff)
downloadop-kernel-dev-f5ad50100680bfe7d2702d2487d303ee122bf5f7.zip
op-kernel-dev-f5ad50100680bfe7d2702d2487d303ee122bf5f7.tar.gz
Merge tag 'driver-core-3.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core and kobject fixes from Greg KH: "Here are some minor fixes for the driver core and kobjects that people have reported recently. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>" * tag 'driver-core-3.4-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: kobject: provide more diagnostic info for kobject_add_internal() failures sysfs: handle 'parent deleted before child added' sysfs: Prevent crash on unset sysfs group attributes sysfs: Update the name hash for an entry after changing the namespace drivers/base: fix compiler warning in SoC export driver - idr should be ida drivers/base: Remove unneeded spin_lock_init call for soc_lock
Diffstat (limited to 'fs')
-rw-r--r--fs/sysfs/dir.c5
-rw-r--r--fs/sysfs/group.c6
2 files changed, 9 insertions, 2 deletions
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index 2a7a3f5..35a36d3 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -729,6 +729,9 @@ int sysfs_create_dir(struct kobject * kobj)
else
parent_sd = &sysfs_root;
+ if (!parent_sd)
+ return -ENOENT;
+
if (sysfs_ns_type(parent_sd))
ns = kobj->ktype->namespace(kobj);
type = sysfs_read_ns_type(kobj);
@@ -878,7 +881,6 @@ int sysfs_rename(struct sysfs_dirent *sd,
dup_name = sd->s_name;
sd->s_name = new_name;
- sd->s_hash = sysfs_name_hash(sd->s_ns, sd->s_name);
}
/* Move to the appropriate place in the appropriate directories rbtree. */
@@ -886,6 +888,7 @@ int sysfs_rename(struct sysfs_dirent *sd,
sysfs_get(new_parent_sd);
sysfs_put(sd->s_parent);
sd->s_ns = new_ns;
+ sd->s_hash = sysfs_name_hash(sd->s_ns, sd->s_name);
sd->s_parent = new_parent_sd;
sysfs_link_sibling(sd);
diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c
index dd1701c..2df555c 100644
--- a/fs/sysfs/group.c
+++ b/fs/sysfs/group.c
@@ -67,7 +67,11 @@ static int internal_create_group(struct kobject *kobj, int update,
/* Updates may happen before the object has been instantiated */
if (unlikely(update && !kobj->sd))
return -EINVAL;
-
+ if (!grp->attrs) {
+ WARN(1, "sysfs: attrs not set by subsystem for group: %s/%s\n",
+ kobj->name, grp->name ? "" : grp->name);
+ return -EINVAL;
+ }
if (grp->name) {
error = sysfs_create_subdir(kobj, grp->name, &sd);
if (error)
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