linux-kernel - [PATCH 3/7] serial: imx: init dma_is

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Date:   Fri, 30 Jun 2017 14:04:42 +0200
From:   Romain Perier <romain.perier@...labora.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-serial@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Nandor Han <nandor.han@...com>,
        Romain Perier <romain.perier@...labora.com>
Subject: [PATCH 3/7] serial: imx: init dma_is_{rx|tx}ing variables

From: Nandor Han <nandor.han@...com>

Initialize both dma_is_{rx|tx}ing variables when DMA is enabled to avoid
checking uninitialized variables if port shutdown is requested before
DMA channels get a chance to start.

Signed-off-by: Nandor Han <nandor.han@...com>
Signed-off-by: Romain Perier <romain.perier@...labora.com>
---
 drivers/tty/serial/imx.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 188063d..81fb413 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1225,6 +1225,9 @@ static void imx_enable_dma(struct imx_port *sport)
 
 	imx_setup_ufcr(sport, TXTL_DMA, RXTL_DMA);
 
+	sport->dma_is_rxing = 0;
+	sport->dma_is_txing = 0;
+
 	sport->dma_is_enabled = 1;
 }
 
-- 
1.8.3.1