Rafael J. Wysocki wrote: > On Wednesday, June 10, 2015 04:05:05 PM Mika Westerberg wrote: > > If a driver requests a GPIO described in its _CRS but the GPIO host > > controller (gpiochip) driver providing the GPIO has not been loaded yet > > acpi_get_gpiod() returns -ENODEV which causes the calling driver to fail. > > > > If the gpiochip driver is loaded afterwards the driver requesting the GPIO > > will not notice this. > > > > Better approach is to return -EPROBE_DEFER in such case. Then when the > > gpiochip driver appears the driver requesting the GPIO will be probed > > again. This also aligns ACPI GPIO lookup code closer to DT as it does > > pretty much the same when no gpiochip driver was found. > > > > Reported-by: Tobias Diedrich <tobiasdiedr...@gmail.com> > > Signed-off-by: Mika Westerberg <mika.westerb...@linux.intel.com> > > Makes sense to me. > > Acked-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Signed-off-by: Tobias Diedrich <ranma+ker...@tdiedrich.de> -- Tobias PGP: http://8ef7ddba.uguu.de -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
