On 13/01/2025 14:27, Nícolas F. R. A. Prado wrote:
In order to get working interrupts, a low offset value needs to be configured. The minimum value for it is 20 Celsius, which is what is configured when there's no lower thermal trip (ie the thermal core passes -INT_MAX as low trip temperature). However, when the temperature gets that low and fluctuates around that value it causes an interrupt storm.
Is it really about an irq storm or about having a temperature threshold set close to the ambiant temperature. So leading to unnecessary wakeups as there is need for mitigation ?
Prevent that interrupt storm by not enabling the low offset interrupt if the low threshold is the minimum one.
The case where the high threshold is the INT_MAX should be handled too. The system may have configured a thermal zone without critical trip points, so setting the next upper threshold will program the register with INT_MAX. I guess it is an undefined behavior in this case, right ?
Cc: stable@xxxxxxxxxxxxxxx
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