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tty: serial: imx: correct dma cookie status

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Correct to check the right rx dma cookie status in spit of it
works because only one cookie is running in the current sdma.
But it will not once sdma driver support multi cookies
running based on virt-dma.

Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Tested-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Robin Gong 2018-06-20 00:56:58 +08:00 committed by Greg Kroah-Hartman
parent e51e597d9f
commit fb7f1bf8d0
1 changed files with 1 additions and 1 deletions
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2
drivers/tty/serial/imx.c
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@ -1052,7 +1052,7 @@ static void imx_uart_dma_rx_callback(void *data)
unsigned int r_bytes;
unsigned int bd_size;
status = dmaengine_tx_status(chan, (dma_cookie_t)0, &state);
status = dmaengine_tx_status(chan, sport->rx_cookie, &state);
if (status == DMA_ERROR) {
imx_uart_clear_rx_errors(sport);