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2016-12-12hwmon: (lm87) Fix overflow seen when writing voltage limit attributesGuenter Roeck1-1/+1
Writes into voltage limit attributes can overflow due to an unbound multiplication. Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2016-12-12hwmon: (nct7802) Fix overflows seen when writing into limit attributesGuenter Roeck1-3/+5
Fix overflows seen when writing voltage and temperature limit attributes. The value passed to DIV_ROUND_CLOSEST() needs to be clamped, and the value parameter passed to nct7802_write_fan_min() is an unsigned long. Also, writing values larger than 2700000 into a fan limit attribute results in writing 0 into the chip's limit registers. The exact behavior when writing this value is unspecified. For consistency, report a limit of 1350000 if the chip register reads 0. This may be wrong, and the chip behavior should be verified with the actual chip, but it is better than reporting a value of 0 (which, when written, results in writing a value of 0x1fff into the chip register). Fixes: 3434f3783580 ("hwmon: Driver for Nuvoton NCT7802Y") Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2016-12-09hwmon: (adt7470) Fix overflows seen when writing into limit attributesGuenter Roeck1-3/+3
Fix overflows seen when writing large values into various temperature limit attributes. The input value passed to DIV_ROUND_CLOSEST() needs to be clamped to avoid such overflows. Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2016-12-09hwmon: (adt7462) Fix overflows seen when writing into limit attributesGuenter Roeck1-6/+6
Fix overflows seen when writing large values into temperature limit, voltage limit, and pwm hysteresis attributes. The input parameter to DIV_ROUND_CLOSEST() needs to be clamped to avoid such overflows. Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2016-12-09hwmon: (adm1026) Fix overflows seen when writing into limit attributesGuenter Roeck1-9/+17
Fix overflows seen when writing large values into voltage limit, temperature limit, temperature offset, and DAC attributes. Overflows are seen due to unbound multiplications and additions. While at it, change the low temperature limit to -128 degrees C, since this is the minimum temperature accepted by the chip. Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2016-12-09hwmon: (adm1025) Fix overflows seen when writing voltage limitsGuenter Roeck1-1/+1
Writes into voltage limit attributes can overflow due to an unbound multiplication. Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
2016-12-09hwmon: (via-cputemp) Convert to hotplug state machineSebastian Andrzej Siewior1-46/+17
Install the callbacks via the state machine and let the core invoke the callbacks on the already online CPUs. When the hotplug state is unregistered the cleanup function is called for each cpu. So both cpu loops in init() and exit() are not longer required. Cc: Jean Delvare <jdelvare@suse.com> Cc: Guenter Roeck <linux@roeck-us.net> Cc: linux-hwmon@vger.kernel.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>