On Fri, Jan 16, 2015 at 04:19:41PM -0800, santosh shilimkar wrote: > On 1/16/2015 2:50 PM, Tony Lindgren wrote: > >Similar to omap_gpio_irq_type() let's make sure that the GPIO > >is usable as an interrupt if the platform init code did not > >call gpio_request(). Otherwise we can get invalid device access > >after setup_irq(): > > > I let Linus W comment on it but IIRC we chewed this issue last > time and the conclusion was the gpio_request() must have to be called > directly or indirectly in case of irq line. That's really not the issue here. The issue is that it's possible to claim the interrupt, and then the driver goes wrong - not only does it attempt in that case to access hardware which is runtime suspended, if the interrupt is subsequently freed, it will then do a pm_runtime_put(). The interrupt code is wrong there, plain and simple. -- FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up according to speedtest.net. -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
