ARM: 8524/1: driver cohandle -EPROBE_DEFER from bus_type.match()

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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).

[changed if-else code structure, adjusted documentation to match the code,
extended comments]

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

...

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Tomeu Vizoso 2016-02-15 09:25:06 +01:00 • committed by Russell King

parent 17f29d36e4

commit 656b8035b0

3 changed files with 31 additions and 6 deletions

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7

include/linux/device.h

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