5.4-stable review patch. If anyone has any objections, please let me know.
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From: David Lechner dlechner@baylibre.com
commit 89944d88f8795c6c89b9514cb365998145511cd4 upstream.
Fix incorrect value mask for register write. Register values are 8-bit, not 9. If this function was called with a value > 0xFF and an even addr, it would cause writing to the next register.
Fixes: f2a22e1e172f ("iio: adc: ad7606: Add support for software mode for ad7616") Signed-off-by: David Lechner dlechner@baylibre.com Reviewed-by: Angelo Dureghello adureghello@baylibre.com Link: https://patch.msgid.link/20250428-iio-adc-ad7606_spi-fix-write-value-mask-v1... Cc: Stable@vger.kernel.org Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/iio/adc/ad7606_spi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/iio/adc/ad7606_spi.c +++ b/drivers/iio/adc/ad7606_spi.c @@ -151,7 +151,7 @@ static int ad7606_spi_reg_write(struct a struct spi_device *spi = to_spi_device(st->dev);
st->d16[0] = cpu_to_be16((st->bops->rd_wr_cmd(addr, 1) << 8) | - (val & 0x1FF)); + (val & 0xFF));
return spi_write(spi, &st->d16[0], sizeof(st->d16[0])); }