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Commit c88db160 authored by Sarah Sharp's avatar Sarah Sharp
Browse files

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: default avatarSarah Sharp <sarah.a.sharp@linux.intel.com>
Reported-by: default avatarWu Fengguang <wfg@linux.intel.com>
parent b01bcbf7

drivers/usb/host/xhci.c

+3 −3
Original line number Diff line number Diff line
@@ -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.

	 */