diff options
-rw-r--r-- | drivers/usb/core/devices.c | 2 | ||||
-rw-r--r-- | drivers/usb/core/hcd.h | 2 | ||||
-rw-r--r-- | drivers/usb/core/hub.c | 6 |
3 files changed, 8 insertions, 2 deletions
diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c index a681d9b92bda..6ec38175a817 100644 --- a/drivers/usb/core/devices.c +++ b/drivers/usb/core/devices.c | |||
@@ -61,8 +61,6 @@ | |||
61 | #include "usb.h" | 61 | #include "usb.h" |
62 | #include "hcd.h" | 62 | #include "hcd.h" |
63 | 63 | ||
64 | #define MAX_TOPO_LEVEL 6 | ||
65 | |||
66 | /* Define ALLOW_SERIAL_NUMBER if you want to see the serial number of devices */ | 64 | /* Define ALLOW_SERIAL_NUMBER if you want to see the serial number of devices */ |
67 | #define ALLOW_SERIAL_NUMBER | 65 | #define ALLOW_SERIAL_NUMBER |
68 | 66 | ||
diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h index 50b8bb2d1212..5b0b59b0d89b 100644 --- a/drivers/usb/core/hcd.h +++ b/drivers/usb/core/hcd.h | |||
@@ -21,6 +21,8 @@ | |||
21 | 21 | ||
22 | #include <linux/rwsem.h> | 22 | #include <linux/rwsem.h> |
23 | 23 | ||
24 | #define MAX_TOPO_LEVEL 6 | ||
25 | |||
24 | /* This file contains declarations of usbcore internals that are mostly | 26 | /* This file contains declarations of usbcore internals that are mostly |
25 | * used or exposed by Host Controller Drivers. | 27 | * used or exposed by Host Controller Drivers. |
26 | */ | 28 | */ |
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index e678ed8bd8c2..3251120b414e 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c | |||
@@ -1051,6 +1051,12 @@ static int hub_probe(struct usb_interface *intf, const struct usb_device_id *id) | |||
1051 | desc = intf->cur_altsetting; | 1051 | desc = intf->cur_altsetting; |
1052 | hdev = interface_to_usbdev(intf); | 1052 | hdev = interface_to_usbdev(intf); |
1053 | 1053 | ||
1054 | if (hdev->level == MAX_TOPO_LEVEL) { | ||
1055 | dev_err(&intf->dev, "Unsupported bus topology: " | ||
1056 | "hub nested too deep\n"); | ||
1057 | return -E2BIG; | ||
1058 | } | ||
1059 | |||
1054 | #ifdef CONFIG_USB_OTG_BLACKLIST_HUB | 1060 | #ifdef CONFIG_USB_OTG_BLACKLIST_HUB |
1055 | if (hdev->parent) { | 1061 | if (hdev->parent) { |
1056 | dev_warn(&intf->dev, "ignoring external hub\n"); | 1062 | dev_warn(&intf->dev, "ignoring external hub\n"); |