diff options
Diffstat (limited to 'drivers/usb/host/r8a66597-hcd.c')
| -rw-r--r-- | drivers/usb/host/r8a66597-hcd.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c index 4cbd0633c5c2..bfa7fa3d2eea 100644 --- a/drivers/usb/host/r8a66597-hcd.c +++ b/drivers/usb/host/r8a66597-hcd.c @@ -2099,16 +2099,13 @@ static void r8a66597_check_detect_child(struct r8a66597 *r8a66597, memset(now_map, 0, sizeof(now_map)); - list_for_each_entry(bus, &usb_bus_list, bus_list) { - if (!bus->root_hub) - continue; - - if (bus->busnum != hcd->self.busnum) - continue; - + mutex_lock(&usb_bus_idr_lock); + bus = idr_find(&usb_bus_idr, hcd->self.busnum); + if (bus && bus->root_hub) { collect_usb_address_map(bus->root_hub, now_map); update_usb_address_map(r8a66597, bus->root_hub, now_map); } + mutex_unlock(&usb_bus_idr_lock); } static int r8a66597_hub_status_data(struct usb_hcd *hcd, char *buf) |