linux-kernel - Re: [PATCH v5 RESEND 3/5] driver core: handle -EPROBE_DEFER from bus

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Date:	Thu, 11 Feb 2016 19:19:07 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Marek Szyprowski <m.szyprowski@...sung.com>
Cc:	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Tomeu Vizoso <tomeu.vizoso@...labora.com>,
	Dan Williams <dan.j.williams@...el.com>,
	Kukjin Kim <kgene@...nel.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: Re: [PATCH v5 RESEND 3/5] driver core: handle -EPROBE_DEFER from
 bus_type.match()

On Wed, Feb 10, 2016 at 11:47:28AM +0100, Marek Szyprowski wrote:
> From: Tomeu Vizoso <tomeu.vizoso@...labora.com>
> 
> 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@...labora.com>
> [changed if-else code structure, adjusted documentation to match the code,
> extended comments]
> Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
> Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>
> ---
>  Documentation/driver-model/porting.txt |  6 ++++--
>  drivers/base/dd.c                      | 24 ++++++++++++++++++++++--
>  include/linux/device.h                 |  7 +++++--
>  3 files changed, 31 insertions(+), 6 deletions(-)


Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>