Hi Grant,
There is a memory corruption bug in 176f9f29cec9 "STAGING:iio:light:
fix ISL29018 init to handle brownout".
In isl29018_chip_init() we call:
status = isl29018_write_data(client, ISL29018_REG_TEST, 0,
ISL29018_TEST_MASK, ISL29018_TEST_SHIFT);
where ISL29018_REG_TEST is 8.
In isl29018_write_data() it uses reg (ISL29018_REG_TEST) as the
offset into the ->reg_cache[] array:
chip->reg_cache[reg] = regval;
But ->reg_cache[] only has 3 elements, so we're past the end of the
array.
I don't know the code well enough to fix this.
regards,
dan carpenter
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