Adam Wujek 1047d4ac66 hwmon: (pmbus) Check PEC support before reading other registers ... [ Upstream commit d1baf7a3a3 ] Make sure that the support of PEC is determined before the read of other registers. Otherwise the validation of PEC can trigger an error on the read of STATUS_BYTE or STATUS_WORD registers. The problematic scenario is the following. A device with enabled PEC support is up and running and a kernel driver is loaded. Then the driver is unloaded (or device unbound), the HW device is reconfigured externally (e.g. by i2cset) to advertise itself as not supporting PEC. Without the move of the code, at the second load of the driver (or bind) the STATUS_BYTE or STATUS_WORD register is always read with PEC enabled, which is likely to cause a read error resulting with fail of a driver load (or bind). Signed-off-by: Adam Wujek <dev_public@wujek.eu> Link: https://lore.kernel.org/r/20220519233334.438621-1-dev_public@wujek.eu Fixes: 75d2b2b06b ("hwmon: (pmbus) disable PEC if not enabled") Fixes: 4e5418f787 ("hwmon: (pmbus_core) Check adapter PEC support") [groeck: Added Fixes: tags, dropped continuation line] Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-06-09 10:23:02 +02:00
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adm1266.c
adm1275.c
bel-pfe.c
bpa-rs600.c	hwmon: (pmbus/bpa-rs600) Add workaround for incorrect Pin max	2021-08-17 14:54:27 -07:00
dps920ab.c	hwmon: (pmbus/dps920ab) Delete some dead code	2021-06-18 12:45:58 -07:00
fsp-3y.c
ibm-cffps.c	hwmon: (pmbus/ibm-cffps) max_power_out swap changes	2021-10-02 04:38:53 -07:00
inspur-ipsps.c
ir35221.c
ir36021.c
ir38064.c
irps5401.c
isl68137.c
Kconfig	hwmon: (pmbus) Add driver for Delta DPS-920AB PSU	2021-06-17 04:21:46 -07:00
lm25066.c	hwmon: (pmbus/lm25066) Let compiler determine outer dimension of lm25066_coeff	2021-11-18 19:16:32 +01:00
ltc2978.c
ltc3815.c
Makefile	hwmon: (pmbus) Add driver for Delta DPS-920AB PSU	2021-06-17 04:21:46 -07:00
max8688.c
max15301.c
max16064.c
max16601.c
max20730.c
max20751.c
max31785.c
max34440.c
mp2888.c
mp2975.c	hwmon: (pmbus/mp2975) Add missed POUT attribute for page 1 mp2975 controller	2021-10-02 04:45:49 -07:00
pim4328.c	hwmon: (pmbus/pim4328) Add PMBus driver for PIM4006, PIM4328 and PIM4820	2021-06-17 04:21:46 -07:00
pm6764tr.c
pmbus.c
pmbus.h	hwmon: (pmbus) Add Vin unit off handling	2022-04-08 14:23:09 +02:00
pmbus_core.c	hwmon: (pmbus) Check PEC support before reading other registers	2022-06-09 10:23:02 +02:00
pxe1610.c
q54sj108a2.c
stpddc60.c
tps40422.c
tps53679.c
ucd9000.c
ucd9200.c
xdpe12284.c
zl6100.c