From 3bbc47d8b07abad56780a8e214520259808c4f8b Mon Sep 17 00:00:00 2001 From: Krzysztof Mazur Date: Thu, 22 Aug 2013 14:49:40 +0200 Subject: [PATCH] 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 Acked-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hub.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 79ec4a7..5d859fc 100644 --- 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); -- 2.7.4