On Fri, May 19, 2017 at 01:42:55PM +0530, surenderpolsani@xxxxxxxxx wrote: > -static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, > - tsl2x7x_power_state_show, tsl2x7x_power_state_store); > +static DEVICE_ATTR_RW(tsl2x7x_power_state); You do realize you just renamed the sysfs file, changing the user/kernel api? That's generally not a good thing to ever do :( thanks, greg k-h _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel