Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

1 files changed, 14 insertions, 44 deletions

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index bc69bd7acebe..35248a37b717 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -304,30 +304,31 @@ static void ehci_watchdog (unsigned long param)
  */
 static int bios_handoff (struct ehci_hcd *ehci, int where, u32 cap)
 {
+        struct pci_dev *pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
+
+        /* always say Linux will own the hardware */
+        pci_write_config_byte(pdev, where + 3, 1);
+
+        /* maybe wait a while for BIOS to respond */
         if (cap & (1 << 16)) {
                 int msec = 5000;
-                struct pci_dev *pdev =
-                                to_pci_dev(ehci_to_hcd(ehci)->self.controller);
 
-                /* request handoff to OS */
-                cap |= 1 << 24;
-                pci_write_config_dword(pdev, where, cap);
-
-                /* and wait a while for it to happen */
                 do {
                         msleep(10);
                         msec -= 10;
                         pci_read_config_dword(pdev, where, &cap);
                 } while ((cap & (1 << 16)) && msec);
                 if (cap & (1 << 16)) {
-                        ehci_err (ehci, "BIOS handoff failed (%d, %04x)\n",
+                        ehci_err(ehci, "BIOS handoff failed (%d, %08x)\n",
                                 where, cap);
                         // some BIOS versions seem buggy...
                         // return 1;
                         ehci_warn (ehci, "continuing after BIOS bug...\n");
-                        return 0;
-                } 
-                ehci_dbg (ehci, "BIOS handoff succeeded\n");
+                        /* disable all SMIs, and clear "BIOS owns" flag */
+                        pci_write_config_dword(pdev, where + 4, 0);
+                        pci_write_config_byte(pdev, where + 2, 0);
+                } else
+                        ehci_dbg(ehci, "BIOS handoff succeeded\n");
         }
         return 0;
 }
@@ -492,8 +493,6 @@ static int ehci_start (struct usb_hcd *hcd)
 {
         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
         u32                     temp;
-        struct usb_device       *udev;
-        struct usb_bus          *bus;
         int                     retval;
         u32                     hcc_params;
         u8                      sbrn = 0;
@@ -588,8 +587,8 @@ static int ehci_start (struct usb_hcd *hcd)
                 writel (0, &ehci->regs->segment);
 #if 0
 // this is deeply broken on almost all architectures
-                if (!pci_set_dma_mask (to_pci_dev(hcd->self.controller), 0xffffffffffffffffULL))
-                        ehci_info (ehci, "enabled 64bit PCI DMA\n");
+                if (!dma_set_mask (hcd->self.controller, DMA_64BIT_MASK))
+                        ehci_info (ehci, "enabled 64bit DMA\n");
 #endif
         }
 
@@ -631,17 +630,6 @@ static int ehci_start (struct usb_hcd *hcd)
 
         /* set async sleep time = 10 us ... ? */
 
-        /* wire up the root hub */
-        bus = hcd_to_bus (hcd);
-        udev = first ? usb_alloc_dev (NULL, bus, 0) : bus->root_hub;
-        if (!udev) {
-done2:
-                ehci_mem_cleanup (ehci);
-                return -ENOMEM;
-        }
-        udev->speed = USB_SPEED_HIGH;
-        udev->state = first ? USB_STATE_ATTACHED : USB_STATE_CONFIGURED;
-
         /*
          * Start, enabling full USB 2.0 functionality ... usb 1.1 devices
          * are explicitly handed to companion controller(s), so no TT is
@@ -664,24 +652,6 @@ done2:
                 first ? "initialized" : "restarted",
                 temp >> 8, temp & 0xff, DRIVER_VERSION);
 
-        /*
-         * From here on, khubd concurrently accesses the root
-         * hub; drivers will be talking to enumerated devices.
-         * (On restart paths, khubd already knows about the root
-         * hub and could find work as soon as we wrote FLAG_CF.)
-         *
-         * Before this point the HC was idle/ready.  After, khubd
-         * and device drivers may start it running.
-         */
-        if (first && usb_hcd_register_root_hub (udev, hcd) != 0) {
-                if (hcd->state == HC_STATE_RUNNING)
-                        ehci_quiesce (ehci);
-                ehci_reset (ehci);
-                usb_put_dev (udev); 
-                retval = -ENODEV;
-                goto done2;
-        }
-
         writel (INTR_MASK, &ehci->regs->intr_enable); /* Turn On Interrupts */
 
         if (first)