From 2464982174a1886b56b445b0503b331008a626fe Mon Sep 17 00:00:00 2001 From: Dirk Behme Date: Tue, 9 Dec 2014 18:11:26 +0900 Subject: [PATCH] serial: imx: unmap sg in case of dmaengine_prep_slave_sg() failure In case dmaengine_prep_slave_sg() fails, add the missing dma_unmap_sg(). Signed-off-by: Dirk Behme Signed-off-by: Anton Bondarenko Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 5cea7d257426..b4cf24c64a15 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -558,6 +558,8 @@ static void imx_dma_tx(struct imx_port *sport) desc = dmaengine_prep_slave_sg(chan, sgl, sport->dma_tx_nents, DMA_MEM_TO_DEV, DMA_PREP_INTERRUPT); if (!desc) { + dma_unmap_sg(dev, sgl, sport->dma_tx_nents, + DMA_TO_DEVICE); dev_err(dev, "We cannot prepare for the TX slave dma!\n"); return; } @@ -947,6 +949,7 @@ static int start_rx_dma(struct imx_port *sport) desc = dmaengine_prep_slave_sg(chan, sgl, 1, DMA_DEV_TO_MEM, DMA_PREP_INTERRUPT); if (!desc) { + dma_unmap_sg(dev, sgl, 1, DMA_FROM_DEVICE); dev_err(dev, "We cannot prepare for the RX slave dma!\n"); return -EINVAL; } -- 2.20.1