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serial: omap: Fix EFR write on RTS deassertion 

Commit 348f9bb31c ("serial: omap: Fix RTS handling") sought to enable
auto RTS upon manual RTS assertion and disable it on deassertion.
However it seems the latter was done incorrectly, it clears all bits in
the Extended Features Register *except* auto RTS.

Fixes: 348f9bb31c ("serial: omap: Fix RTS handling")
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Lukas Wunner 2017-10-21 10:50:18 +02:00 committed by Greg Kroah-Hartman
parent e60f9fd03b
commit 2a71de2f73
1 changed files with 1 additions and 1 deletions
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2
drivers/tty/serial/omap-serial.c
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@ -693,7 +693,7 @@ static void serial_omap_set_mctrl(struct uart_port *port, unsigned int mctrl)
if ((mctrl & TIOCM_RTS) && (port->status & UPSTAT_AUTORTS))
up->efr |= UART_EFR_RTS;
else
up->efr &= UART_EFR_RTS;
up->efr &= ~UART_EFR_RTS;
serial_out(up, UART_EFR, up->efr);
serial_out(up, UART_LCR, lcr);