From: Alan Stern Date: Thu, 11 Aug 2005 19:50:32 +0000 (-0400) Subject: [PATCH] USB: Support unbinding of the usb_generic driver X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=3b4d7f79164853e10342d707e32307e0c8054982;p=openwrt%2Fstaging%2Fblogic.git [PATCH] USB: Support unbinding of the usb_generic driver This patch (as556) adds support for unbinding the usb_generic "driver". That driver only binds to USB devices, as opposed to interfaces, and it does nothing much besides marking which struct device's go with an overall USB device plus providing suspend/resume methods. Now that users can unbind drivers at will using the sysfs "unbind" attribute, we need a rational way of dealing with USB devices that are no longer under full control of the USB stack. The patch handles this by unconfiguring the device, thereby removing all the interfaces and their associated drivers and children. Signed-off-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index 109f7558167a..087af73a59dd 100644 --- a/drivers/usb/core/usb.c +++ b/drivers/usb/core/usb.c @@ -65,6 +65,16 @@ static int generic_probe (struct device *dev) } static int generic_remove (struct device *dev) { + struct usb_device *udev = to_usb_device(dev); + + /* if this is only an unbind, not a physical disconnect, then + * unconfigure the device */ + if (udev->state == USB_STATE_CONFIGURED) + usb_set_configuration(udev, 0); + + /* in case the call failed or the device was suspended */ + if (udev->state >= USB_STATE_CONFIGURED) + usb_disable_device(udev, 0); return 0; }