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xhci: remove the unused sw_lpm_support

Browse source 
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: Zeng Tao <prime.zeng@hisilicon.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Zeng Tao 2018-12-07 16:19:29 +02:00 committed by Greg Kroah-Hartman
parent 3ea5eb139f
commit f1fd62a6b6
3 changed files with 5 additions and 20 deletions
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20
drivers/usb/host/xhci-mem.c
View file

@ -2181,23 +2181,11 @@ 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)) {
if ((xhci->hci_version >= 0x100) && (major_revision != 0x03) &&
(temp & XHCI_HLC)) {
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) {
xhci_dbg_trace(xhci, trace_xhci_dbg_init,
"xHCI 1.0: support USB2 hardware lpm");
xhci->hw_lpm_support = 1;
}
"xHCI 1.0: support USB2 hardware lpm");
xhci->hw_lpm_support = 1;
}
port_offset--;

3
drivers/usb/host/xhci.c
View file

@ -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 */

2
drivers/usb/host/xhci.h
View file

@ -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 */