Re: [PATCH v5 3/5] driver core: handle -EPROBE_DEFER from bus_type.match()

From: Marek Szyprowski
Date: Mon Jan 25 2016 - 01:57:02 EST

Hi Greg,

On 2016-01-04 18:12, Greg Kroah-Hartman wrote:
On Mon, Jan 04, 2016 at 04:31:00PM +0000, Russell King - ARM Linux wrote:
On Wed, Dec 23, 2015 at 11:59:26AM +0100, Marek Szyprowski wrote:
From: Tomeu Vizoso <tomeu.vizoso@xxxxxxxxxxxxx>

Allow implementations of the match() callback in struct bus_type to
return errors and if it's -EPROBE_DEFER then queue the device for
deferred probing.

This is useful to buses such as AMBA in which devices are registered
before their matching information can be retrieved from the HW
(typically because a clock driver hasn't probed yet).

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@xxxxxxxxxxxxx>
[changed if-else code structure, adjusted documentation to match the code,
extended comments]
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Reviewed-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
This patch _really_ needs an ack from Greg before I can merge it.

M: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
T: git git:// Supported
F: Documentation/kobject.txt
F: drivers/base/

alternatively, the whole series should be taken by Greg, with my ack
for the amba and ARM bits.

Given that Greg is unlikely to respond this close to the merge window
(he's not responded to my messages about the amba-pl011 driver having
been messed up by the wrong patch set being taken...) I think this has
basically missed the 4.5 merge window. Sorry.
I've been on vacation, so give me a week or so to catch up on

And yes, this missed the 4.5 merge window, that closed last week for my

Could you take a look into this patch?

Best regards
Marek Szyprowski, PhD
Samsung R&D Institute Poland