Commits
Peter Hurley committed fba594a848f
serial: core: Remove unsafe x_char optimization uart_unthrottle() attempts to avoid sending START and the previous x_char if the previous x_char has not yet been sent. However, this optimization could leave the sender in a throttled state; for example, if the sender is throttled and this unthrottle coincides with a manual tcflow(TCION) from user-space, then neither START would be sent. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>