This is a note to let you know that I've just added the patch titled

iio: adc: MCP3564: fix calib_bias and calib_scale range checks

to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 85ac6d92fdfd6097a16d9c61363fe1d0272c1604 Mon Sep 17 00:00:00 2001 From: Javier Carrasco javier.carrasco.cruz@gmail.com Date: Fri, 1 Dec 2023 10:48:03 +0100 Subject: iio: adc: MCP3564: fix calib_bias and calib_scale range checks

The current implementation uses the AND (&&) operator to check if the value to write for IIO_CHAN_INFO_CALIBBIAS and IIO_CHAN_INFO_CALIBSCALE is within the valid ranges. The evaluated values are the lower and upper limits of the ranges, so this operation always evaluates to false.

The OR (||) operator must be used instead.

Signed-off-by: Javier Carrasco javier.carrasco.cruz@gmail.com Reviewed-by: Marius Cristea marius.cristea@microchip.com Link: https://lore.kernel.org/r/20231201-mcp3564_range_checks-v1-1-68f4436e22b0@gm... Cc: Stable@vger.kernel.org Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com --- drivers/iio/adc/mcp3564.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/adc/mcp3564.c b/drivers/iio/adc/mcp3564.c index e3f1de5fcc5a..d5fb1cae8aeb 100644 --- a/drivers/iio/adc/mcp3564.c +++ b/drivers/iio/adc/mcp3564.c @@ -918,7 +918,7 @@ static int mcp3564_write_raw(struct iio_dev *indio_dev, mutex_unlock(&adc->lock); return ret; case IIO_CHAN_INFO_CALIBBIAS: - if (val < mcp3564_calib_bias[0] && val > mcp3564_calib_bias[2]) + if (val < mcp3564_calib_bias[0] || val > mcp3564_calib_bias[2]) return -EINVAL;

mutex_lock(&adc->lock); @@ -928,7 +928,7 @@ static int mcp3564_write_raw(struct iio_dev *indio_dev, mutex_unlock(&adc->lock); return ret; case IIO_CHAN_INFO_CALIBSCALE: - if (val < mcp3564_calib_scale[0] && val > mcp3564_calib_scale[2]) + if (val < mcp3564_calib_scale[0] || val > mcp3564_calib_scale[2]) return -EINVAL;

if (adc->calib_scale == val)