From: Dirk Behme <dirk.behme@xxxxxxxxxxxx>
In case dmaengine_prep_slave_sg() fails, add the missing dma_unmap_sg().
Signed-off-by: Dirk Behme <dirk.behme@xxxxxxxxxxxx>
Signed-off-by: Anton Bondarenko <anton_bondarenko@xxxxxxxxxx>
---
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 f4b0f6b..a0bfccf 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;
}
--
1.9.3
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