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H A D | serial_core.c | fba594a8 Tue Sep 02 16:39:14 CDT 2014 Peter Hurley <peter@hurleysoftware.com> 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>
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