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| author | Alan Stern <stern@rowland.harvard.edu> | 2005-08-11 15:50:32 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2005-09-08 16:28:22 -0700 |
| commit | 3b4d7f79164853e10342d707e32307e0c8054982 (patch) | |
| tree | 6413fc59dacef3d757f06252f57fdb3c153d1a8f | |
| parent | 3ea15966ed59f2bc20928c7b0496b4585f6de206 (diff) | |
| download | kernel_samsung_smdk4412-3b4d7f79164853e10342d707e32307e0c8054982.zip kernel_samsung_smdk4412-3b4d7f79164853e10342d707e32307e0c8054982.tar.gz kernel_samsung_smdk4412-3b4d7f79164853e10342d707e32307e0c8054982.tar.bz2 | |
[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 <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/usb/core/usb.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index 109f755..087af73 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; } |