On Wed, Jun 10, 2015 at 3:05 PM, Mika Westerberg <mika.westerb...@linux.intel.com> 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> Patch applied with the ACKs etc. Yours, Linus Walleij -- 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/
