last_child was abused by the old usb code to first store 1 if the usb_device was not the root of the usb tree, and then later on re-used to store whether or not the usb_device is actually the last child.
The dm-usb code was always setting it to actually reflect the last-child status which is wrong for the last child leading to output like this:
USB device tree: 1 Hub (12 Mb/s, 100mA) | ALCOR USB Hub 2.0 | | 2 Mass Storage (12 Mb/s, 100mA) | USB Flash Disk 4C0E960F | +-3 Human Interface (1.5 Mb/s, 100mA) SINO WEALTH USB Composite Device
Instead of this:
USB device tree: 1 Hub (12 Mb/s, 100mA) | ALCOR USB Hub 2.0 | +-2 Mass Storage (12 Mb/s, 100mA) | USB Flash Disk 4C0E960F | +-3 Human Interface (1.5 Mb/s, 100mA) SINO WEALTH USB Composite Device
This commit fixes this by first checking that the device is not root, and then setting last_child. This commit also updates the old code to not abuse the last_child variable to store the root check result.
Signed-off-by: Hans de Goede hdegoede@redhat.com --- common/cmd_usb.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/common/cmd_usb.c b/common/cmd_usb.c index eab55cd..ca06826 100644 --- a/common/cmd_usb.c +++ b/common/cmd_usb.c @@ -355,12 +355,12 @@ static void usb_show_tree_graph(struct usb_device *dev, char *pre) #endif /* check if we are the last one */ #ifdef CONFIG_DM_USB - last_child = device_is_last_sibling(dev->dev); + /* Not the root of the usb tree? */ + if (device_get_uclass_id(dev->dev->parent) != UCLASS_USB) { + last_child = device_is_last_sibling(dev->dev); #else - last_child = (dev->parent != NULL); -#endif - if (last_child) { -#ifndef CONFIG_DM_USB + if (dev->parent != NULL) { /* not root? */ + last_child = 1; for (i = 0; i < dev->parent->maxchild; i++) { /* search for children */ if (dev->parent->children[i] == dev) {