Commit f1fd62a6 authored by Zeng Tao's avatar Zeng Tao Committed by Greg Kroah-Hartman
Browse files

xhci: remove the unused sw_lpm_support 



It is introduced for the pre-0.96 xHC controllers, and the driver only
support HW LPM for 1.0 and later controllers.It's not actually used now
and is thought not to be used in the future any more, so just remove it.

Signed-off-by: default avatarZeng Tao <prime.zeng@hisilicon.com>
Signed-off-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 3ea5eb13

drivers/usb/host/xhci-mem.c

+4 −16
Original line number Diff line number Diff line
@@ -2181,24 +2181,12 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, 
	if (major_revision < 0x03 && xhci->num_ext_caps < max_caps)

		xhci->ext_caps[xhci->num_ext_caps++] = temp;



	/* Check the host's USB2 LPM capability */

	if ((xhci->hci_version == 0x96) && (major_revision != 0x03) &&

			(temp & XHCI_L1C)) {

		xhci_dbg_trace(xhci, trace_xhci_dbg_init,

				"xHCI 0.96: support USB2 software lpm");

		xhci->sw_lpm_support = 1;

	}



	if ((xhci->hci_version >= 0x100) && (major_revision != 0x03)) {

		xhci_dbg_trace(xhci, trace_xhci_dbg_init,

				"xHCI 1.0: support USB2 software lpm");

		xhci->sw_lpm_support = 1;

		if (temp & XHCI_HLC) {

	if ((xhci->hci_version >= 0x100) && (major_revision != 0x03) &&

		 (temp & XHCI_HLC)) {

		xhci_dbg_trace(xhci, trace_xhci_dbg_init,

			       "xHCI 1.0: support USB2 hardware lpm");

		xhci->hw_lpm_support = 1;

	}

	}



	port_offset--;

	for (i = port_offset; i < (port_offset + port_count); i++) {

drivers/usb/host/xhci.c

+1 −2
Original line number Diff line number Diff line
@@ -4370,8 +4370,7 @@ static int xhci_update_device(struct usb_hcd *hcd, struct usb_device *udev) 
	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);

	int		portnum = udev->portnum - 1;



	if (hcd->speed >= HCD_USB3 || !xhci->sw_lpm_support ||

			!udev->lpm_capable)

	if (hcd->speed >= HCD_USB3 || !udev->lpm_capable)

		return 0;



	/* we only support lpm for non-hub device connected to root hub yet */

drivers/usb/host/xhci.h

+0 −2
Original line number Diff line number Diff line
@@ -1858,8 +1858,6 @@ struct xhci_hcd { 
	struct xhci_port	*hw_ports;

	struct xhci_hub		usb2_rhub;

	struct xhci_hub		usb3_rhub;

	/* support xHCI 0.96 spec USB2 software LPM */

	unsigned		sw_lpm_support:1;

	/* support xHCI 1.0 spec USB2 hardware LPM */

	unsigned		hw_lpm_support:1;

	/* cached usb2 extened protocol capabilites */

CRA Git | Maintained and supported by SUSTech CRA and CCSE