[PATCH 3/3] usb: use ep-specific pwrgood delay

[Steffen Trumtrar]

In usb_hub_configure the hub is asked for its descriptor and among other things
its bPwrOn2PwrGood time. In the actual hub_power_on function this information
was not used and a hardcoded value was used instead. For some hubs this delay
is to short. So, use the delay the hub wants.

Signed-off-by: Steffen Trumtrar <s.trumtrar at pengutronix.de>
Signed-off-by: Michael Grzeschik <m.grzeschik at pengutronix.de>
---
 drivers/usb/core/usb.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 81ae9f1..48bc121 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -948,7 +948,8 @@ static void usb_hub_power_on(struct usb_hub_device *hub)
 		usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
 		USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status);
 	}
-	mdelay(20);
+	/* power on is encoded in 2ms increments -> times 2 for the actual delay */
+	mdelay(hub->desc.bPwrOn2PwrGood*2);
 }
 
 #define MAX_TRIES 5
-- 
1.7.10.4