USB: keyspan: fix NULL-pointer dereferences and memory leaks
Fix NULL-pointer dereference at release by moving port data allocation and deallocation to port_probe and port_remove. Fix NULL-pointer dereference at disconnect by stopping port urbs at port_remove. Since commit 0998d063 (device-core: Ensure drvdata = NULL when no driver is bound) the port private data is no longer accessible at disconnect or release. Note that this patch also fixes port and interface-data memory leaks in the error path of attach should port initialisation fail for any port. Compile-only tested. Cc: <stable@vger.kernel.org> Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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