+/**
+ * sysfs_refresh_driver_devices: Refreshes drivers list of devices
+ * @driver: sysfs_driver whose devices list needs to be refreshed
+ *
+ * NOTE: Upon return from this function, prior sysfs_device references from
+ * this driver's list of devices _may_ not be valid
+ *
+ * Returns dlist of devices on success and NULL on failure
+ */
+struct dlist *sysfs_refresh_driver_devices(struct sysfs_driver *driver)
+{
+ if (driver == NULL) {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ if (driver->devices != NULL) {
+ dlist_destroy(driver->devices);
+ driver->devices = NULL;
+ }
+
+ if (driver->directory == NULL)
+ return (sysfs_get_driver_devices(driver));
+
+ if ((sysfs_refresh_dir_links(driver->directory)) != 0) {
+ dprintf("Error refreshing driver links\n");
+ return NULL;
+ }
+
+ return (sysfs_get_driver_devices(driver));
+}
+
+/**
+ * sysfs_get_driver_device: looks up a device from a list of driver's devices
+ * and returns its sysfs_device corresponding to it
+ * @driver: sysfs_driver on which to search
+ * @name: name of the device to search
+ * Returns a sysfs_device if found, NULL otherwise
+ */
+struct sysfs_device *sysfs_get_driver_device(struct sysfs_driver *driver,
+ const char *name)
+{
+ struct sysfs_device *device = NULL;
+ struct dlist *devlist = NULL;
+
+ if (driver == NULL || name == NULL) {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ if (driver->devices == NULL) {
+ devlist = sysfs_get_driver_devices(driver);
+ if (devlist == NULL) {
+ dprintf("Error getting driver devices\n");
+ return NULL;
+ }
+ }
+ dlist_for_each_data(driver->devices, device, struct sysfs_device) {
+ if (!(strncmp(device->name, name, SYSFS_NAME_LEN)))
+ return device;
+ }
+ return NULL;
+}
+
+/**
+ * get_driver_path: looks up the bus the driver is on and builds path to
+ * the driver.
+ * @bus: bus on which to search
+ * @drv: driver to look for
+ * @path: buffer to return path to driver
+ * @psize: size of "path"
+ * Returns 0 on success and -1 on error
+ */
+static int get_driver_path(const char *bus, const char *drv,
+ char *path, size_t psize)
+{
+ if (bus == NULL || drv == NULL || path == NULL || psize == 0) {
+ errno = EINVAL;
+ return -1;
+ }
+ if (sysfs_get_mnt_path(path, psize) != 0) {
+ dprintf("Error getting sysfs mount path\n");
+ return -1;
+ }
+ safestrcatmax(path, "/", psize);
+ safestrcatmax(path, SYSFS_BUS_NAME, psize);
+ safestrcatmax(path, "/", psize);
+ safestrcatmax(path, bus, psize);
+ safestrcatmax(path, "/", psize);
+ safestrcatmax(path, SYSFS_DRIVERS_NAME, psize);
+ safestrcatmax(path, "/", psize);
+ safestrcatmax(path, drv, psize);
+ return 0;
+}