Alexander Zangerl f9a1af37b8 iio: pressure: ms5611: ms5611_prom_is_valid false negative bug ... commit fd39d9668f upstream. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-10-19 23:05:36 +02:00
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abp060mg.c
bmp280-core.c	iio: pressure: bmp280: Fix NULL pointer exception	2023-10-19 23:05:36 +02:00
bmp280-i2c.c
bmp280-regmap.c
bmp280-spi.c
bmp280.h
cros_ec_baro.c
dlhl60d.c
dps310.c	iio: pressure: dps310: Adjust Timeout Settings	2023-10-19 23:05:36 +02:00
hid-sensor-press.c
hp03.c
hp206c.c
icp10100.c
Kconfig
Makefile
mpl115_i2c.c
mpl115_spi.c
mpl115.c
mpl115.h
mpl3115.c
ms5611_core.c	iio: pressure: ms5611: ms5611_prom_is_valid false negative bug	2023-10-19 23:05:36 +02:00
ms5611_i2c.c	iio: ms5611: Simplify IO callback parameters	2022-12-02 17:41:00 +01:00
ms5611_spi.c	iio: ms5611: Simplify IO callback parameters	2022-12-02 17:41:00 +01:00
ms5611.h	iio: pressure: ms5611: fixed value compensation bug	2022-12-02 17:41:00 +01:00
ms5637.c
st_pressure_buffer.c
st_pressure_core.c
st_pressure_i2c.c
st_pressure_spi.c
st_pressure.h
t5403.c
zpa2326_i2c.c
zpa2326_spi.c
zpa2326.c
zpa2326.h