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authorSascha Hauer <s.hauer@pengutronix.de>2016-03-17 09:21:50 +0100
committerMark Brown <broonie@kernel.org>2016-03-17 11:44:34 +0000
commitcd8dd41a33264a4602539711f76670c2a1f4d007 (patch)
tree02dc88065f7ef16bf68912944e0a21f824354e56
parent793c7f9212fdb7bea5e017427e750afa11217c29 (diff)
spi: imx: Fix possible NULL pointer deref
transfer could be NULL in spi_imx_can_dma() when it's called from spi_imx_setupxfer() with a NULL transfer. Test for a NULL pointer before dereferencing it. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Cc: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Mark Brown <broonie@kernel.org>
-rw-r--r--drivers/spi/spi-imx.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index b79d70d6dabf..50769078e72e 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -211,11 +211,15 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
struct spi_transfer *transfer)
{
struct spi_imx_data *spi_imx = spi_master_get_devdata(master);
- unsigned int bpw = transfer->bits_per_word;
+ unsigned int bpw;
if (!master->dma_rx)
return false;
+ if (!transfer)
+ return false;
+
+ bpw = transfer->bits_per_word;
if (!bpw)
bpw = spi->bits_per_word;