err = sx150x_i2c_read(chip->client, reg,&data); if (err>= 0) - err = (data& mask) != 0 ? 1 : 0; + err = (data& mask) != 0 ? -EIO : 0;
This doesn't work. The IO pins are gpio data pins, which are used as 0 or 1 data values (see sx150x_gpio_get). Returning -EIO whenever an attempt is made to gpio_get_value on a non-zero gpio line will break things.
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