[PATCH AUTOSEL 5.6 31/68] spi: spi-fsl-dspi: Avoid NULL pointer in dspi_slave_abort for non-DMA mode

Sasha Levin
2020-04-10T04:01:58Z

From: Vladimir Oltean <vladimir.oltean@nxp.com>

[ Upstream commit 3d6224e63be39ff26cf416492cb3923cd3d07dd0 ]

The driver does not create the dspi->dma structure unless operating in
DSPI_DMA_MODE, so it makes sense to check for that.

Fixes: f4b323905d8b ("spi: Introduce dspi_slave_abort() function for NXP's dspi SPI driver")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20200318001603.9650-8-olteanv@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/spi/spi-fsl-dspi.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index 6ec2dcb8c57a6..2ce65edf16b66 100644
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -1021,8 +1021,10 @@ static int dspi_slave_abort(struct spi_master *master)
* Terminate all pending DMA transactions for the SPI working
* in SLAVE mode.
*/
- dmaengine_terminate_sync(dspi->dma->chan_rx);
- dmaengine_terminate_sync(dspi->dma->chan_tx);
+ if (dspi->devtype_data->trans_mode == DSPI_DMA_MODE) {
+ dmaengine_terminate_sync(dspi->dma->chan_rx);
+ dmaengine_terminate_sync(dspi->dma->chan_tx);
+ }

/* Clear the internal DSPI RX and TX FIFO buffers */
regmap_update_bits(dspi->regmap, SPI_MCR,
--
2.20.1