Re: [ALSA STABLE 3/3] a few more -- unregister platform device again if probe was unsuccessful

On Thu, Apr 13, 2006 at 04:05:33PM +0200, Rene Herman wrote:
Not honouring/passing up probe() method error returns, not even -ENODEV,
makes some sense for discoverable busses such as PCI where you at least
have a driver independent bus_id sitting in /sys/devices/pci* that you
can later echo into /sys/bus/pci/drivers/*/bind to make the driver bind
to a device, but not much sense for the platform bus. Platform devices
only "exist" (in /sys/devices/platform) due to the driver creating them
itself and keeping them after failing a probe means that directory
becomes an enumeration of the drivers we loaded, rather than a view of
what's present in the system.

Incorrect. In some circumstances, they may be created by architecture
support code, and might be created and destroyed dynamically by
architecture support code.

The driver model crowd did not seem exceedingly interested in the
problem though:

http://marc.theaimsgroup.com/?l=linux-kernel&m=114417829014332&w=2

Incorrect summary. The ALSA use model of the driver model doesn't fit
with the driver model use model. It's not that we're not interested
in it - it's that it's perverted to the way driver model folk intend
the subsystem to work, and the way that platform devices are used on
some architectures.

--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core
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