linux-kernel - [PATCH 4.14 111/137] serial: imx: restore handshaking irq for imx1

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Date:   Tue,  2 Oct 2018 06:25:12 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Leonard Crestez <leonard.crestez@....com>
Subject: [PATCH 4.14 111/137] serial: imx: restore handshaking irq for imx1

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

commit 7e620984b62532783912312e334f3c48cdacbd5d upstream.

Back in 2015 when irda was dropped from the driver imx1 was broken. This
change reintroduces the support for the third interrupt of the UART.

Fixes: afe9cbb1a6ad ("serial: imx: drop support for IRDA")
Cc: stable <stable@...r.kernel.org>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Reviewed-by: Leonard Crestez <leonard.crestez@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>


---
 drivers/tty/serial/imx.c |    8 ++++++++
 1 file changed, 8 insertions(+)

--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -2213,6 +2213,14 @@ static int serial_imx_probe(struct platf
 				ret);
 			return ret;
 		}
+
+		ret = devm_request_irq(&pdev->dev, rtsirq, imx_rtsint, 0,
+				       dev_name(&pdev->dev), sport);
+		if (ret) {
+			dev_err(&pdev->dev, "failed to request rts irq: %d\n",
+				ret);
+			return ret;
+		}
 	} else {
 		ret = devm_request_irq(&pdev->dev, rxirq, imx_int, 0,
 				       dev_name(&pdev->dev), sport);