diff options
| author | Fugang Duan <b38611@freescale.com> | 2015-11-11 09:31:04 +0800 |
|---|---|---|
| committer | Jason Liu <jason.hui.liu@nxp.com> | 2019-02-12 10:26:02 +0800 |
| commit | 8e80ee77c7e952e96710316ae3525a99986fed2a (patch) | |
| tree | 34505207f29a9d53e3c35354ff0bb4b14696cea5 /drivers/tty/serial/imx.c | |
| parent | aa91843b7aa5f32f4b2a69777de888772050e932 (diff) | |
MLK-11851 tty: series: imx: add dma memory check before freeing
Add dma memory check before free it.
Signed-off-by: Fugang Duan <B38611@freescale.com>
Diffstat (limited to 'drivers/tty/serial/imx.c')
| -rw-r--r-- | drivers/tty/serial/imx.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index b2ca614e21bf..41aa463bee8a 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -1127,10 +1127,12 @@ static void imx_uart_dma_exit(struct imx_port *sport) dma_release_channel(sport->dma_chan_rx); sport->dma_chan_rx = NULL; - dma_free_coherent(NULL, IMX_RXBD_NUM * RX_BUF_SIZE, - (void *)sport->rx_buf.buf, - sport->rx_buf.dmaaddr); - sport->rx_buf.buf = NULL; + if (sport->rx_buf.buf) { + dma_free_coherent(NULL, IMX_RXBD_NUM * RX_BUF_SIZE, + (void *)sport->rx_buf.buf, + sport->rx_buf.dmaaddr); + sport->rx_buf.buf = NULL; + } } if (sport->dma_chan_tx) { |