On Tue, Sep 08, 2015 at 07:12:31PM -0500, Andreas Dannenberg wrote: > This commit extends the use of the existing mutex to pave the way for > using direct device access inside sysfs getter/setter routines in a > way that the access during interrupts and timer routines does not > interfere with device access by the CPU or between multiple cores. > > This also addresses a potential race condition that could be caused > by bq24257_irq_handler_thread() and bq24257_iilimit_autoset() accessing > the device simultaneously. What potential race? AFAIK, we're doing all the operations through regmap, and regmap operations are serialized. It has its own mutex for this. Unless I got it all wrong... So, IMHO, you don't need to protect against simultaneous device access. It's taken care of by regmap. Chip state data protection should be enough. laurentiu -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
