diff options
| -rw-r--r-- | libsysfs/sysfs_device.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/libsysfs/sysfs_device.c b/libsysfs/sysfs_device.c index d1c5b321f0..1c59403edd 100644 --- a/libsysfs/sysfs_device.c +++ b/libsysfs/sysfs_device.c @@ -383,7 +383,7 @@ struct sysfs_device *sysfs_open_device(const char *bus, const char *bus_id) */ struct sysfs_device *sysfs_get_device_parent(struct sysfs_device *dev) { - char ppath[SYSFS_PATH_MAX], *tmp; + char ppath[SYSFS_PATH_MAX], dpath[SYSFS_PATH_MAX], *tmp; if (!dev) { errno = EINVAL; @@ -394,6 +394,7 @@ struct sysfs_device *sysfs_get_device_parent(struct sysfs_device *dev) return (dev->parent); memset(ppath, 0, SYSFS_PATH_MAX); + memset(dpath, 0, SYSFS_PATH_MAX); safestrcpy(ppath, dev->path); tmp = strrchr(ppath, '/'); if (!tmp) { @@ -410,16 +411,14 @@ struct sysfs_device *sysfs_get_device_parent(struct sysfs_device *dev) } *tmp = '\0'; - /* - * All "devices" have the "detach_state" attribute - validate here - */ - safestrcat(ppath, "/detach_state"); - if (sysfs_path_is_file(ppath)) { + /* Make sure we're not at the top of the device tree */ + sysfs_get_mnt_path(dpath, SYSFS_PATH_MAX); + safestrcat(dpath, "/" SYSFS_DEVICES_NAME); + if (strcmp(dpath, ppath) == 0) { dprintf("Device at %s does not have a parent\n", dev->path); return NULL; } - tmp = strrchr(ppath, '/'); - *tmp = '\0'; + dev->parent = sysfs_open_device_path(ppath); if (!dev->parent) { dprintf("Error opening device %s's parent at %s\n", |