Unverified Commit f571d913 authored by Clark Wang's avatar Clark Wang Committed by Mark Brown
Browse files

spi: lpspi: run transfer speed_hz sanity check 



Avoid config.speed_hz is 0 when it is a divisor.

Signed-off-by: default avatarHan Xu <han.xu@nxp.com>
Signed-off-by: default avatarClark Wang <xiaoning.wang@nxp.com>
Link: https://lore.kernel.org/r/20230505064159.3964473-1-xiaoning.wang@nxp.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 47e02559

drivers/spi/spi-fsl-lpspi.c

+6 −0
Original line number Diff line number Diff line
@@ -303,6 +303,12 @@ static int fsl_lpspi_set_bitrate(struct fsl_lpspi_data *fsl_lpspi) 


	perclk_rate = clk_get_rate(fsl_lpspi->clk_per);



	if (!config.speed_hz) {

		dev_err(fsl_lpspi->dev,

			"error: the transmission speed provided is 0!\n");

		return -EINVAL;

	}



	if (config.speed_hz > perclk_rate / 2) {

		dev_err(fsl_lpspi->dev,

		      "per-clk should be at least two times of transfer speed");