New patch to review for coreboot: 82568c6 libpayload: Add check for failure in usb_attach_device()

[Nico Huber]

Nico Huber ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1131

-gerrit

commit 82568c60960b61ff510b1ba4ef24a688e1a900ae
Author: Nico Huber 
Date:   Thu Jun 21 11:21:23 2012 +0200

libpayload: Add check for failure in usb_attach_device()

This adds a simple check if a device is really configured before
    returning it's address to the usb hub driver who wants to attach it.

Change-Id: I6fea140217c3e7468cc48ef7c3cbf2be8d11f47a
    Signed-off-by: Nico Huber 
---
 payloads/libpayload/drivers/usb/usb.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/payloads/libpayload/drivers/usb/usb.c b/payloads/libpayload/drivers/usb/usb.c
index 99b65e0..d5514f9 100644
--- a/payloads/libpayload/drivers/usb/usb.c
+++ b/payloads/libpayload/drivers/usb/usb.c
@@ -487,6 +487,7 @@ usb_attach_device(hci_t *controller, int hubaddress, int port, int speed)
    usbdev_t *newdev_t = controller->devices[newdev];
    // determine responsible driver - current done in set_address
    newdev_t->init (newdev_t);
-	return newdev;
+	/* init() may have called usb_detach_device() yet, so check */
+	return controller->devices[newdev] ? newdev : -1;
 }