spi: imx: fix spi resource leak with dma transfer
In spi_imx_dma_transfer(), when desc_rx = dmaengine_prep_slave_sg()
fails, the context goes to label no_dma and then return. However,
the memory allocated for desc_tx has not been freed yet, which leads
to resource leak.
Signed-off-by: Gao Pan <pandy.gao@nxp.com>
Reviewed-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index d98c33c..6a4ff27 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -929,7 +929,7 @@
tx->sgl, tx->nents, DMA_MEM_TO_DEV,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc_tx)
- goto no_dma;
+ goto tx_nodma;
desc_tx->callback = spi_imx_dma_tx_callback;
desc_tx->callback_param = (void *)spi_imx;
@@ -941,7 +941,7 @@
rx->sgl, rx->nents, DMA_DEV_TO_MEM,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
if (!desc_rx)
- goto no_dma;
+ goto rx_nodma;
desc_rx->callback = spi_imx_dma_rx_callback;
desc_rx->callback_param = (void *)spi_imx;
@@ -1008,7 +1008,9 @@
return ret;
-no_dma:
+rx_nodma:
+ dmaengine_terminate_all(master->dma_tx);
+tx_nodma:
pr_warn_once("%s %s: DMA not available, falling back to PIO\n",
dev_driver_string(&master->dev),
dev_name(&master->dev));
