linux-stable/drivers/iio/pressure
Alexander Zangerl fd39d9668f iio: pressure: ms5611: ms5611_prom_is_valid false negative bug
The ms5611 driver falsely rejects lots of MS5607-02BA03-50 chips
with "PROM integrity check failed" because it doesn't accept a prom crc
value of zero as legitimate.

According to the datasheet for this chip (and the manufacturer's
application note about the PROM CRC), none of the possible values for the
CRC are excluded - but the current code in ms5611_prom_is_valid() ends with

return crc_orig != 0x0000 && crc == crc_orig

Discussed with the driver author (Tomasz Duszynski) and he indicated that
at that time (2015) he was dealing with some faulty chip samples which
returned blank data under some circumstances and/or followed example code
which indicated CRC zero being bad.

As far as I can tell this exception should not be applied anymore; We've
got a few hundred custom boards here with this chip where large numbers
of the prom have a legitimate CRC value 0, and do work fine, but which the
current driver code wrongly rejects.

Signed-off-by: Alexander Zangerl <az@breathe-safe.com>
Fixes: c0644160a8 ("iio: pressure: add support for MS5611 pressure and temperature sensor")
Link: https://lore.kernel.org/r/2535-1695168070.831792@Ze3y.dhYT.s3fx
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2023-10-05 18:06:46 +01:00
..
abp060mg.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
bmp280-core.c iio: pressure: bmp280: Fix NULL pointer exception 2023-09-11 20:12:59 +01:00
bmp280-i2c.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
bmp280-regmap.c iio: pressure: bmp280: Add support for new sensor BMP580 2023-03-11 12:18:29 +00:00
bmp280-spi.c iio: pressure: bmp280: Add support for new sensor BMP580 2023-03-11 12:18:29 +00:00
bmp280.h iio: pressure: bmp280: Add nvmem operations for BMP580 2023-03-11 12:18:29 +00:00
cros_ec_baro.c iio: cros: Register FIFO callback after sensor is registered 2022-07-18 18:29:13 +01:00
dlhl60d.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
dps310.c iio: pressure: dps310: Adjust Timeout Settings 2023-10-05 18:06:45 +01:00
hid-sensor-press.c
hp03.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
hp206c.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
icp10100.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
Kconfig iio: pressure: Honeywell mprls0025pa pressure sensor 2023-05-21 18:54:58 +01:00
Makefile iio: pressure: Honeywell mprls0025pa pressure sensor 2023-05-21 18:54:58 +01:00
mpl115.c iio: pressure: mpl115: Implementing low power mode by shutdown gpio 2022-11-23 19:44:00 +00:00
mpl115.h iio: pressure: mpl115: Implementing low power mode by shutdown gpio 2022-11-23 19:44:00 +00:00
mpl115_i2c.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
mpl115_spi.c iio: pressure: mpl115: Implementing low power mode by shutdown gpio 2022-11-23 19:44:00 +00:00
mpl3115.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
mprls0025pa.c iio: pressure: Honeywell mprls0025pa pressure sensor 2023-05-21 18:54:58 +01:00
ms5611.h iio: pressure: ms5611: Switch to fully devm_ managed registration. 2022-12-28 17:19:45 +00:00
ms5611_core.c iio: pressure: ms5611: ms5611_prom_is_valid false negative bug 2023-10-05 18:06:46 +01:00
ms5611_i2c.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
ms5611_spi.c iio: pressure: ms5611: Switch to fully devm_ managed registration. 2022-12-28 17:19:45 +00:00
ms5637.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
st_pressure.h iio: pressure: st_pressure: Add support for LPS22DF 2022-09-21 18:42:53 +01:00
st_pressure_buffer.c
st_pressure_core.c iio: pressure: st_pressure: Add support for LPS22DF 2022-09-21 18:42:53 +01:00
st_pressure_i2c.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
st_pressure_spi.c iio: pressure: st_pressure: Add support for LPS22DF 2022-09-21 18:42:53 +01:00
t5403.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
zpa2326.c iio: Rename iio_trigger_poll_chained and add kernel-doc 2023-03-11 12:18:29 +00:00
zpa2326.h
zpa2326_i2c.c iio: Switch i2c drivers back to use .probe() 2023-05-21 18:54:53 +01:00
zpa2326_spi.c Char/Misc and other driver updates for 5.18-rc1 2022-03-28 12:27:35 -07:00