VServer 1.9.2 (patch-2.6.8.1-vs1.9.2.diff)

[linux-2.6.git] / drivers / usb / core / devices.c

diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c
index 30b4378..5541363 100644 (file)
--- a/drivers/usb/core/devices.c
+++ b/drivers/usb/core/devices.c
@@ -589,6 +589,8 @@ static ssize_t usb_device_read(struct file *file, char __user *buf, size_t nbyte
                bus = list_entry(buslist, struct usb_bus, bus_list);
 
                /* recurse through all children of the root hub */
+               if (!bus->root_hub)
+                       continue;
                down(&bus->root_hub->serialize);
                ret = usb_device_dump(&buf, &nbytes, &skip_bytes, ppos, bus->root_hub, bus, 0, 0, 0);
                up(&bus->root_hub->serialize);