diff options
| author | Marek Vasut <marex@denx.de> | 2016-09-26 15:14:53 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2016-09-26 19:08:46 +0300 |
| commit | f13d4e189d209af0f552e9900acd06ee4a35e601 (patch) | |
| tree | fd296df6645eb783150cac054f698331504a6980 | |
| parent | 15ca92156e6242060dff91c8d8e7fe7ae82d424a (diff) | |
| download | linux-f13d4e189d209af0f552e9900acd06ee4a35e601.tar.xz | |
spi: imx: Gracefully handle NULL master->cs_gpios
It is possible that master->cs_gpios is NULL after spi_bitbang_start(),
this happens if the master has no CS GPIOs specified in DT. Check for
this case after spi_bitbang_start() to prevent NULL pointer dereference
in the subsequent for loop, which accesses the master->cs_gpios field.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Martin Kaiser <martin@kaiser.cx>
Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | drivers/spi/spi-imx.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 53e7a326c213..1ef5429afcb6 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -1268,6 +1268,11 @@ static int spi_imx_probe(struct platform_device *pdev) goto out_clk_put; } + if (!master->cs_gpios) { + dev_err(&pdev->dev, "No CS GPIOs available\n"); + goto out_clk_put; + } + for (i = 0; i < master->num_chipselect; i++) { if (!gpio_is_valid(master->cs_gpios[i])) continue; |