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Subject[PATCH 2/3] sysfs: remove error messages for -EEXIST case
It is possible that the entry in sysfs already exists, one case of this is
when a network device is renamed to bonding_masters. Anyway, in this case
the proper error path is for device_rename to return an error code, not to
generate bogus backtrace and errors.

Also, to avoid possible races, the create link should be done before the
remove link. This makes a device rename atomic operation like other renames.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>

--- a/drivers/base/core.c 2008-05-14 17:56:36.000000000 -0700
+++ b/drivers/base/core.c 2008-05-14 17:56:40.000000000 -0700
@@ -1218,13 +1218,11 @@ int device_rename(struct device *dev, ch
}
#else
if (dev->class) {
- sysfs_remove_link(&dev->class->subsys.kobj, old_device_name);
error = sysfs_create_link(&dev->class->subsys.kobj, &dev->kobj,
dev->bus_id);
- if (error) {
- dev_err(dev, "%s: sysfs_create_symlink failed (%d)\n",
- __func__, error);
- }
+ if (error)
+ goto out;
+ sysfs_remove_link(&dev->class->subsys.kobj, old_device_name);
}
#endif

--- a/fs/sysfs/dir.c 2008-05-14 17:56:36.000000000 -0700
+++ b/fs/sysfs/dir.c 2008-05-14 17:56:40.000000000 -0700
@@ -419,12 +419,8 @@ void sysfs_addrm_start(struct sysfs_addr
*/
int sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd)
{
- if (sysfs_find_dirent(acxt->parent_sd, sd->s_name)) {
- printk(KERN_WARNING "sysfs: duplicate filename '%s' "
- "can not be created\n", sd->s_name);
- WARN_ON(1);
+ if (sysfs_find_dirent(acxt->parent_sd, sd->s_name))
return -EEXIST;
- }

sd->s_parent = sysfs_get(acxt->parent_sd);


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