2.6.39-stable review patch. If anyone has any objections, please let us know.
------------------ From: Alan Stern <[email protected]> commit e534c5b831c8b8e9f5edee5c8a37753c808b80dc upstream. This patch (as1476) fixes a regression introduced by fccf4e86200b8f5edd9a65da26f150e32ba79808 (USB: Free bandwidth when usb_disable_device is called). usb_disconnect() grabs the bandwidth_mutex before calling usb_disable_device(), which calls down indirectly to usb_set_interface(), which tries to acquire the bandwidth_mutex. The fix causes usb_set_interface() to return early when it is called for an interface that has already been unregistered, which is what happens in usb_disable_device(). Signed-off-by: Alan Stern <[email protected]> Tested-by: Sarah Sharp <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/usb/core/message.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/usb/core/message.c +++ b/drivers/usb/core/message.c @@ -1286,6 +1286,8 @@ int usb_set_interface(struct usb_device interface); return -EINVAL; } + if (iface->unregistering) + return -ENODEV; alt = usb_altnum_to_altsetting(iface, alternate); if (!alt) { _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
