From bcca06efea883bdf3803a0bb0ffa60f26730387d Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Tue, 13 Jan 2009 11:35:54 -0500 Subject: USB: don't enable wakeup by default for PCI host controllers This patch (as1199) changes the initial wakeup settings for PCI USB host controllers. The controllers are marked as capable of waking the system, but wakeup is not enabled by default. It turns out that enabling wakeup for USB host controllers has a lot of bad consequences. As the simplest example, if a USB mouse or keyboard is unplugged immediately after the computer is put to sleep, the unplug will cause the system to wake back up again! We are better off marking them as wakeup-capable and leaving wakeup disabled. Signed-off-by: Alan Stern Reported-by: Rafael J. Wysocki CC: David Brownell Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/hcd-pci.c | 1 - drivers/usb/host/ehci-pci.c | 2 +- drivers/usb/host/ohci-hcd.c | 8 +++----- 3 files changed, 4 insertions(+), 7 deletions(-) (limited to 'drivers/usb') diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c index 507741ed448..99432785f43 100644 --- a/drivers/usb/core/hcd-pci.c +++ b/drivers/usb/core/hcd-pci.c @@ -128,7 +128,6 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) } pci_set_master(dev); - device_set_wakeup_enable(&dev->dev, 1); retval = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED); if (retval != 0) diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c index bdc6e86e1f8..9faa5c8fe02 100644 --- a/drivers/usb/host/ehci-pci.c +++ b/drivers/usb/host/ehci-pci.c @@ -230,7 +230,7 @@ static int ehci_pci_setup(struct usb_hcd *hcd) pci_read_config_word(pdev, 0x62, &port_wake); if (port_wake & 0x0001) { dev_warn(&pdev->dev, "Enabling legacy PCI PM\n"); - device_init_wakeup(&pdev->dev, 1); + device_set_wakeup_capable(&pdev->dev, 1); } } diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c index 65a9609f4ad..5cf5f1eca4f 100644 --- a/drivers/usb/host/ohci-hcd.c +++ b/drivers/usb/host/ohci-hcd.c @@ -593,12 +593,10 @@ static int ohci_run (struct ohci_hcd *ohci) * to be checked in case boot firmware (BIOS/SMM/...) has set up * wakeup in a way the bus isn't aware of (e.g., legacy PCI PM). * If the bus glue detected wakeup capability then it should - * already be enabled. Either way, if wakeup should be enabled - * but isn't, we'll enable it now. + * already be enabled; if so we'll just enable it again. */ - if ((ohci->hc_control & OHCI_CTRL_RWC) != 0 - && !device_can_wakeup(hcd->self.controller)) - device_init_wakeup(hcd->self.controller, 1); + if ((ohci->hc_control & OHCI_CTRL_RWC) != 0) + device_set_wakeup_capable(hcd->self.controller, 1); switch (ohci->hc_control & OHCI_CTRL_HCFS) { case OHCI_USB_OPER: -- cgit v1.2.3