USB: serial: suppress driver bind attributes
commit fdb838efa31e1ed9a13ae6ad0b64e30fdbd00570 upstream.
USB-serial drivers must not be unbound from their ports before the
corresponding USB driver is unbound from the parent interface so
suppress the bind and unbind attributes.
Unbinding a serial driver while it's port is open is a sure way to
trigger a crash as any driver state is released on unbind while port
hangup is handled on the parent USB interface level. Drivers for
multiport devices where ports share a resource such as an interrupt
endpoint also generally cannot handle individual ports going away.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable <firstname.lastname@example.org>
Reviewed-by: Greg Kroah-Hartman <email@example.com>
Signed-off-by: Johan Hovold <firstname.lastname@example.org>
Signed-off-by: Greg Kroah-Hartman <email@example.com>
Signed-off-by: Lee Jones <firstname.lastname@example.org>
1 file changed