xhci: Fix DIV_ROUND_UP compile error.

Fengguang reports that the xHCI driver isn't linked properly on his
machine:

ERROR: "__udivdi3" [drivers/usb/host/xhci-hcd.ko] undefined!
ERROR: "handle_edge_irq" [drivers/gpio/gpio-pch.ko] undefined!
ERROR: "irq_to_desc" [drivers/gpio/gpio-pch.ko] undefined!

The driver compiles fine on my 64-bit box (gcc version 4.6.1).
Fengguang thinks it's because the xHCI driver was using DIV_ROUND_UP()
instead of DIV_ROUND_UP_ULL() with arguments that were unsigned long
long variables.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Reported-by: Wu Fengguang <wfg@linux.intel.com>

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index ad9ef05..afdc73e 100644 (file)
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -3956,7 +3956,7 @@ static u16 xhci_calculate_intel_u1_timeout(struct usb_device *udev,
                /* Otherwise the calculation is the same as isoc eps */
        case USB_ENDPOINT_XFER_ISOC:
                timeout_ns = xhci_service_interval_to_ns(desc);
-               timeout_ns = DIV_ROUND_UP(timeout_ns * 105, 100);
+               timeout_ns = DIV_ROUND_UP_ULL(timeout_ns * 105, 100);
                if (timeout_ns < udev->u1_params.sel * 2)
                        timeout_ns = udev->u1_params.sel * 2;
                break;
@@ -3965,7 +3965,7 @@ static u16 xhci_calculate_intel_u1_timeout(struct usb_device *udev,
        }
 
        /* The U1 timeout is encoded in 1us intervals. */
-       timeout_ns = DIV_ROUND_UP(timeout_ns, 1000);
+       timeout_ns = DIV_ROUND_UP_ULL(timeout_ns, 1000);
        /* Don't return a timeout of zero, because that's USB3_LPM_DISABLED. */
        if (timeout_ns == USB3_LPM_DISABLED)
                timeout_ns++;
@@ -4004,7 +4004,7 @@ static u16 xhci_calculate_intel_u2_timeout(struct usb_device *udev,
                timeout_ns = u2_del_ns;
 
        /* The U2 timeout is encoded in 256us intervals */
-       timeout_ns = DIV_ROUND_UP(timeout_ns, 256 * 1000);
+       timeout_ns = DIV_ROUND_UP_ULL(timeout_ns, 256 * 1000);
        /* If the necessary timeout value is bigger than what we can set in the
         * USB 3.0 hub, we have to disable hub-initiated U2.
         */