diff options
| author | Michael Walle <[email protected]> | 2020-03-25 10:06:58 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2020-03-26 15:34:05 +0100 |
| commit | d7c53fb081c6347675bcd6fc4a9306111c42c111 (patch) | |
| tree | ec943b76880598a53f207fbd5dd11d0f023a96b6 | |
| parent | d0e7600b914c9fd4935fe6dabf0cd5d71cb94347 (diff) | |
tty: serial: fsl_lpuart: fix return value checking
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 <[email protected]>
Signed-off-by: Michael Walle <[email protected]>
Reviewed-by: Fugang Duan <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
| -rw-r--r-- | drivers/tty/serial/fsl_lpuart.c | 2 |
1 files changed, 1 insertions, 1 deletions
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); |