[coreboot-gerrit] Change in coreboot[master]: libpayload/drivers/usb: Fix broken retry counter

[Patrick Rudolph (Code Review)]

Patrick Rudolph has uploaded this change for review. ( https://review.coreboot.org/23688

Change subject: libpayload/drivers/usb: Fix broken retry counter
......................................................................

libpayload/drivers/usb: Fix broken retry counter

Exit on first sucessful CONTROL transfer instead of doing
GET_DESCRIPTOR_TRIES iterations.

Tested on Lenovo T500 using UHCI controller.

Change-Id: I7c881c08d94636a43223338e46c876b5f3e27d47
Signed-off-by: Patrick Rudolph 
---
M payloads/libpayload/drivers/usb/usb.c
1 file changed, 3 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/88/23688/1

diff --git a/payloads/libpayload/drivers/usb/usb.c b/payloads/libpayload/drivers/usb/usb.c
index bb42f89..906df84 100644
--- a/payloads/libpayload/drivers/usb/usb.c
+++ b/payloads/libpayload/drivers/usb/usb.c
@@ -173,10 +173,11 @@

ret = dev->controller->control(dev, IN,
    			sizeof(dr), &dr, len, data);
-		if (ret)
+
+		if (ret != len)
    		udelay(10);
    	else
-			return 0;
+			return len;
    }
    return ret;
 }