USB: EHCI: remove unused Link Power Management code

This patch (as1622) removes the USB-2.1 Link Power Management code
from the ehci-hcd driver.  This code was never integrated with
usbcore, it is full of bugs, and it was not getting used by anybody.

However, the debugging code for dumping the LPM-related fields in the
EHCI registers is left in place.  In theory it might be useful to see
these values, even though we don't use them.

This essentially amounts to a partial revert of commit
aa4d8342988d0c1a79ff19b2ede1e81dfbb16ea5 (USB: EHCI: EHCI 1.1
addendum: preparation) and an almost full revert of commit
48f24970144479c29b8cee6d2e1dbedf6dcf9cfb (USB: EHCI: EHCI 1.1
addendum: Basic LPM feature support) plus its follow-ons.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 1 insertions, 12 deletions

diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index 7880ba621f89..e17330ae0aee 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -202,11 +202,6 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
                 break;
         case PCI_VENDOR_ID_INTEL:
                 ehci->need_io_watchdog = 0;
-                if (pdev->device == 0x0806 || pdev->device == 0x0811
-                                || pdev->device == 0x0829) {
-                        ehci_info(ehci, "disable lpm for langwell/penwell\n");
-                        ehci->has_lpm = 0;
-                }
                 break;
         case PCI_VENDOR_ID_NVIDIA:
                 switch (pdev->device) {
@@ -216,8 +211,7 @@ static int ehci_pci_setup(struct usb_hcd *hcd)
                  * devices with PPCD enabled.
                  */
                 case 0x0d9d:
-                        ehci_info(ehci, "disable lpm/ppcd for nvidia mcp89");
-                        ehci->has_lpm = 0;
+                        ehci_info(ehci, "disable ppcd for nvidia mcp89\n");
                         ehci->has_ppcd = 0;
                         ehci->command &= ~CMD_PPCEE;
                         break;
@@ -425,11 +419,6 @@ static const struct hc_driver ehci_pci_hc_driver = {
         .relinquish_port =      ehci_relinquish_port,
         .port_handed_over =     ehci_port_handed_over,
 
-        /*
-         * call back when device connected and addressed
-         */
-        .update_device =        ehci_update_device,
-
         .clear_tt_buffer_complete       = ehci_clear_tt_buffer_complete,
 };