Guys: On Sat, Mar 12, 2011 at 10:24 PM, Bill Gatliff <[email protected]> wrote: > +static ssize_t pwm_duty_ns_show(struct device *dev, > + struct device_attribute *attr, > + char *buf) > +{ > + struct pwm_device *p = to_pwm_device(dev); > + return sprintf(buf, "%lu\n", pwm_get_duty_ns(p)); > +}
What would happen if device_unregister() was called on the above device while duty_ns_show() was running? My hope is that the device_unregister() would decrement the usage count on the device, but the count would still be nonzero due to the running attribute method; thus, the device would not be deleted. When the method exited, the usage count would become zero and THEN the device would disappear. Is that how things work? (I have looked at the code for device_unregister() and friends, but haven't yet been able to answer this question for myself; said code seems nontrivial). b.g. -- Bill Gatliff [email protected] -- To unsubscribe from this list: send the line "unsubscribe linux-embedded" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
