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Message-Id: <20210712061031.964396520@linuxfoundation.org>
Date: Mon, 12 Jul 2021 08:10:31 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Michael Walle <michael@...le.cc>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.13 608/800] serial: fsl_lpuart: remove RTSCTS handling from get_mctrl()
From: Michael Walle <michael@...le.cc>
[ Upstream commit e60c2991f18bf221fa9908ff10cb24eaedaa9bae ]
The wrong code in set_mctrl() was already removed in commit 2b30efe2e88a
("tty: serial: lpuart: Remove unnecessary code from set_mctrl"), but the
code in get_mctrl() wasn't removed. It will not return the state of the
RTS or CTS line but whether automatic flow control is enabled, which is
wrong for the get_mctrl(). Thus remove it.
Fixes: 2b30efe2e88a ("tty: serial: lpuart: Remove unnecessary code from set_mctrl")
Signed-off-by: Michael Walle <michael@...le.cc>
Link: https://lore.kernel.org/r/20210512141255.18277-7-michael@walle.cc
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/tty/serial/fsl_lpuart.c | 12 +-----------
1 file changed, 1 insertion(+), 11 deletions(-)
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index fbf2e4d2d22b..9c78e43e669d 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1408,17 +1408,7 @@ static unsigned int lpuart_get_mctrl(struct uart_port *port)
static unsigned int lpuart32_get_mctrl(struct uart_port *port)
{
- unsigned int temp = 0;
- unsigned long reg;
-
- reg = lpuart32_read(port, UARTMODIR);
- if (reg & UARTMODIR_TXCTSE)
- temp |= TIOCM_CTS;
-
- if (reg & UARTMODIR_RXRTSE)
- temp |= TIOCM_RTS;
-
- return temp;
+ return 0;
}
static void lpuart_set_mctrl(struct uart_port *port, unsigned int mctrl)
--
2.30.2
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