forked from luck/tmp_suning_uos_patched
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>
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@ -211,11 +211,15 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
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struct spi_transfer *transfer)
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{
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struct spi_imx_data *spi_imx = spi_master_get_devdata(master);
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unsigned int bpw = transfer->bits_per_word;
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unsigned int bpw;
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if (!master->dma_rx)
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return false;
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if (!transfer)
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return false;
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bpw = transfer->bits_per_word;
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if (!bpw)
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bpw = spi->bits_per_word;
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