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From: Michael Walle <michael@walle.cc>
To: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Jiri Slaby <jslaby@suse.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Andy Duan <fugang.duan@nxp.com>, Michael Walle <michael@walle.cc>,
	Leonard Crestez <leonard.crestez@nxp.com>
Subject: [PATCH v2 2/2] tty: serial: fsl_lpuart: fix return value checking
Date: Wed, 25 Mar 2020 10:06:58 +0100
Message-ID: <20200325090658.25967-2-michael@walle.cc> (raw)
In-Reply-To: <20200325090658.25967-1-michael@walle.cc>

The return value of lpuart_dma_tx_request() is an negative errno on
failure and zero on success.

Fixes: 159381df1442f ("tty: serial: fsl_lpuart: fix DMA operation when using IOMMU")
Reported-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Michael Walle <michael@walle.cc>
---
changes since v1:
 - none

 drivers/tty/serial/fsl_lpuart.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index 131018979b77..5d41075964f2 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1538,7 +1538,7 @@ static void lpuart_tx_dma_startup(struct lpuart_port *sport)
 		goto err;
 
 	ret = lpuart_dma_tx_request(&sport->port);
-	if (!ret)
+	if (ret)
 		goto err;
 
 	init_waitqueue_head(&sport->dma_wait);
-- 
2.20.1


  reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-25  9:06 [PATCH v2 1/2] tty: serial: fsl_lpuart: move dma_request_chan() Michael Walle
2020-03-25  9:06 ` Michael Walle [this message]
2020-03-25 10:07   ` [EXT] [PATCH v2 2/2] tty: serial: fsl_lpuart: fix return value checking Andy Duan
2020-03-25 10:03 ` [EXT] [PATCH v2 1/2] tty: serial: fsl_lpuart: move dma_request_chan() Andy Duan
2020-03-25 18:05 ` Leonard Crestez
2020-03-26 14:32   ` Greg Kroah-Hartman

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