usb: don't use bNbrPorts after initialization

After successful initialization hub->descriptor->bNbrPorts and
hub->hdev->maxchild are equal, but using hub->hdev->maxchild is
preferred because that value is explicitly used for initialization
of hub->ports[].

Signed-off-by: Krzysztof Mazur <krzysiek@podlesie.net>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 79ec4a7..5d859fc 100644 (file)
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -451,7 +451,7 @@ static void led_work (struct work_struct *work)
        if (hdev->state != USB_STATE_CONFIGURED || hub->quiescing)
                return;
 
-       for (i = 0; i < hub->descriptor->bNbrPorts; i++) {
+       for (i = 0; i < hdev->maxchild; i++) {
                unsigned        selector, mode;
 
                /* 30%-50% duty cycle */
@@ -500,7 +500,7 @@ static void led_work (struct work_struct *work)
        }
        if (!changed && blinkenlights) {
                cursor++;
-               cursor %= hub->descriptor->bNbrPorts;
+               cursor %= hdev->maxchild;
                set_port_led(hub, cursor + 1, HUB_LED_GREEN);
                hub->indicator[cursor] = INDICATOR_CYCLE;
                changed++;
@@ -830,7 +830,7 @@ static unsigned hub_power_on(struct usb_hub *hub, bool do_delay)
        else
                dev_dbg(hub->intfdev, "trying to enable port power on "
                                "non-switchable hub\n");
-       for (port1 = 1; port1 <= hub->descriptor->bNbrPorts; port1++)
+       for (port1 = 1; port1 <= hub->hdev->maxchild; port1++)
                if (hub->ports[port1 - 1]->power_is_on)
                        set_port_feature(hub->hdev, port1, USB_PORT_FEAT_POWER);
                else
@@ -4648,9 +4648,7 @@ static void hub_events(void)
                hub_dev = hub->intfdev;
                intf = to_usb_interface(hub_dev);
                dev_dbg(hub_dev, "state %d ports %d chg %04x evt %04x\n",
-                               hdev->state, hub->descriptor
-                                       ? hub->descriptor->bNbrPorts
-                                       : 0,
+                               hdev->state, hdev->maxchild,
                                /* NOTE: expects max 15 ports... */
                                (u16) hub->change_bits[0],
                                (u16) hub->event_bits[0]);
@@ -4695,7 +4693,7 @@ static void hub_events(void)
                }
 
                /* deal with port status changes */
-               for (i = 1; i <= hub->descriptor->bNbrPorts; i++) {
+               for (i = 1; i <= hdev->maxchild; i++) {
                        if (test_bit(i, hub->busy_bits))
                                continue;
                        connect_change = test_bit(i, hub->change_bits);