Commit cd8dd41a authored by Sascha Hauer's avatar Sascha Hauer Committed by Mark Brown

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: default avatarSascha Hauer <s.hauer@pengutronix.de>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 793c7f92
...@@ -211,11 +211,15 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi, ...@@ -211,11 +211,15 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
struct spi_transfer *transfer) struct spi_transfer *transfer)
{ {
struct spi_imx_data *spi_imx = spi_master_get_devdata(master); 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) if (!master->dma_rx)
return false; return false;
if (!transfer)
return false;
bpw = transfer->bits_per_word;
if (!bpw) if (!bpw)
bpw = spi->bits_per_word; bpw = spi->bits_per_word;
......
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