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From:   Vladimir Oltean <olteanv@gmail.com>
To:     broonie@kernel.org
Cc:     linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org,
        shawnguo@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com,
        devicetree@vger.kernel.org, eha@deif.com, angelo@sysam.it,
        andrew.smirnov@gmail.com, gustavo@embeddedor.com, weic@nvidia.com,
        mhosny@nvidia.com, michael@walle.cc, peng.ma@nxp.com
Subject: [PATCH v5 07/12] spi: spi-fsl-dspi: Avoid NULL pointer in dspi_slave_abort for non-DMA mode
Date:   Wed, 18 Mar 2020 02:15:58 +0200
Message-Id: <20200318001603.9650-8-olteanv@gmail.com>
In-Reply-To: <20200318001603.9650-1-olteanv@gmail.com>
References: <20200318001603.9650-1-olteanv@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
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From: Vladimir Oltean <vladimir.oltean@nxp.com>

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>
---
Changes in v5:
None.

Changes in v4:
Patch is new.

 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 b65c21d048f9..81e22b6eadc7 100644
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -1192,8 +1192,10 @@ 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,
-- 
2.17.1