On Fri, 3 Sept 2021 at 01:04, Saravana Kannan <saravanak@xxxxxxxxxx> wrote: > > The OF platform code sets up simple bus only devices (i.e. devices that > won't match with any other driver) to get probed by the simple-pm-bus to > keep fw_devlink from blocking probe() or sync_state() [1] callbacks of > other devices. There's no need to populate the child devices since the > OF platform code would do that anyway, so return early for these simple > bus only devices. This looks like a neat solution to our problem. Although, a few comments below. > > [1] - https://lore.kernel.org/lkml/CAPDyKFo9Bxremkb1dDrr4OcXSpE0keVze94Cm=zrkOVxHHxBmQ@xxxxxxxxxxxxxx/ > Signed-off-by: Saravana Kannan <saravanak@xxxxxxxxxx> > Tested-by: Saravana Kannan <saravanak@xxxxxxxxxx> > --- > drivers/bus/simple-pm-bus.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/drivers/bus/simple-pm-bus.c b/drivers/bus/simple-pm-bus.c > index 01a3d0cd08ed..91d52021b7f9 100644 > --- a/drivers/bus/simple-pm-bus.c > +++ b/drivers/bus/simple-pm-bus.c > @@ -19,6 +19,13 @@ static int simple_pm_bus_probe(struct platform_device *pdev) > const struct of_dev_auxdata *lookup = dev_get_platdata(&pdev->dev); > struct device_node *np = pdev->dev.of_node; > > + /* > + * These are transparent bus devices (not simple-pm-bus matches) that > + * get populated automatically. So, don't need to do anything more. > + */ > + if (pdev->driver_override) > + return 0; You need the same kind of check in simple_pm_bus_remove(), to avoid pm_runtime_disable(). At least for consistency. > + > dev_dbg(&pdev->dev, "%s\n", __func__); > > pm_runtime_enable(&pdev->dev); > -- > 2.33.0.153.gba50c8fa24-goog > It also looks like we should flip the order of the patches in the series, to keep things bisectable. Kind regards Uffe
