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Message-ID: <1445474088.30295.5.camel@ellerman.id.au> Date: Thu, 22 Oct 2015 11:34:48 +1100 From: Michael Ellerman <mpe@...erman.id.au> To: Scott Wood <scottwood@...escale.com>, Tomeu Vizoso <tomeu.vizoso@...labora.com> Cc: devicetree@...r.kernel.org, linux-acpi@...r.kernel.org, Arnd Bergmann <arnd@...db.de>, Stephen Warren <swarren@...dotorg.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Linus Walleij <linus.walleij@...aro.org>, Dmitry Torokhov <dmitry.torokhov@...il.com>, "Rafael J. Wysocki" <rjw@...ysocki.net>, linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>, Javier Martinez Canillas <javier@....samsung.com>, Mark Brown <broonie@...nel.org>, Thierry Reding <thierry.reding@...il.com>, Alan Stern <stern@...land.harvard.edu>, Hu Mingkai-B21284 <Mingkai.Hu@...escale.com>, linuxppc-dev@...ts.ozlabs.org, linux-arm-kernel@...ts.infradead.org Subject: Re: [PATCH v6 22/22] of/platform: Defer probes of registered devices On Wed, 2015-10-21 at 00:54 -0500, Scott Wood wrote: > On Mon, 2015-09-21 at 16:03 +0200, Tomeu Vizoso wrote: > > Instead of trying to match and probe platform and AMBA devices right > > after each is registered, delay their probes until device_initcall_sync. > > > > This means that devices will start probing once all built-in drivers > > have registered, and after all platform and AMBA devices from the DT > > have been registered already. > > > > This allows us to prevent deferred probes by probing dependencies on > > demand. > > > > Signed-off-by: Tomeu Vizoso <tomeu.vizoso@...labora.com> > > --- > > > > Changes in v4: > > - Also defer probes of AMBA devices registered from the DT as they can > > also request resources. > > > > drivers/of/platform.c | 11 ++++++++--- > > 1 file changed, 8 insertions(+), 3 deletions(-) > > This breaks arch/powerpc/sysdev/fsl_pci.c. The PCI bus is an OF platform > device, and it must be probed before pcibios_init() which is a > subsys_initcall(), or else the PCI bus never gets scanned. Ah right. This is presumably why I'm not seeing any PCI devices on my p5020ds with linux-next. cheers -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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