[PATCH v2 2/2] tty: serial: fsl_lpuart: fix return value checking

[Michael Walle]

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@xxxxxxx>
Signed-off-by: Michael Walle <michael@xxxxxxxx>
---
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