diff options
| author | Gao Pan <pandy.gao@nxp.com> | 2016-01-18 10:44:01 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-01-22 19:46:58 +0300 |
| commit | f8efca2f1783050368c71e978ee32d3aa692637b (patch) | |
| tree | 6b4032cdcd74759d85739bad456cd792c6ceebd0 /drivers/spi/spi-imx.c | |
| parent | cabeea980879c2c701b0bd03f145c9f7dae17a63 (diff) | |
| download | linux-f8efca2f1783050368c71e978ee32d3aa692637b.tar.xz | |
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>
Diffstat (limited to 'drivers/spi/spi-imx.c')
| -rw-r--r-- | drivers/spi/spi-imx.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index d98c33cb64f9..6a4ff27f4357 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -929,7 +929,7 @@ static int spi_imx_dma_transfer(struct spi_imx_data *spi_imx, 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 @@ static int spi_imx_dma_transfer(struct spi_imx_data *spi_imx, 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 @@ static int spi_imx_dma_transfer(struct spi_imx_data *spi_imx, 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)); |