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dm: usb: Remove inactive children after a bus scan

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Each scan of the USB bus may return different results. Existing driver-model
devices are reused when found, but if a device no longer exists it will stay
around, de-activated, but bound.

Detect these devices and remove them after the scan completes.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2015-11-08 23:48:00 -07:00
parent e8ea5e8c85
commit eae11bece6
1 changed files with 23 additions and 0 deletions
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23
drivers/usb/host/usb-uclass.c
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@ -202,6 +202,20 @@ static void usb_scan_bus(struct udevice *bus, bool recurse)
printf("%d USB Device(s) found\n", priv->next_addr);
}
static void remove_inactive_children(struct uclass *uc, struct udevice *bus)
{
uclass_foreach_dev(bus, uc) {
struct udevice *dev, *next;
if (!device_active(bus))
continue;
device_foreach_child_safe(dev, next, bus) {
if (!device_active(dev))
device_unbind(dev);
}
}
}
int usb_init(void)
{
int controllers_initialized = 0;
@ -270,6 +284,15 @@ int usb_init(void)
}
debug("scan end\n");
/* Remove any devices that were not found on this scan */
remove_inactive_children(uc, bus);
ret = uclass_get(UCLASS_USB_HUB, &uc);
if (ret)
return ret;
remove_inactive_children(uc, bus);
/* if we were not able to find at least one working bus, bail out */
if (!count)
printf("No controllers found\n");