linux-kernel - Re: [PATCH 2.6.21-rc1] ibmebus: Use of_device

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Message-ID: <45D6CC81.1040004@246tNt.com>
Date:	Sat, 17 Feb 2007 10:36:01 +0100
From:	Sylvain Munaut <tnt@...tNt.com>
To:	Hoang-Nam Nguyen <hnguyen@...ux.vnet.ibm.com>
CC:	paulus@...ba.org, linuxppc-dev@...abs.org,
	linux-kernel@...r.kernel.org, johnrose@...ibm.com,
	pmac@....ibm.com, fenkes@...ibm.com
Subject: Re: [PATCH 2.6.21-rc1] ibmebus: Use of_device_uevent()

Hoang-Nam Nguyen wrote:
> This patch replaces ibmebus_uevent() by Sylvain's generic function.
>
>  struct bus_type ibmebus_bus_type = {
> -	.name = "ibmebus",
> -	.uevent = ibmebus_uevent,
> -	.match = ibmebus_bus_match,
> +	.name   = "ibmebus",
> +	.uevent = of_device_uevent,
> +	.match  = ibmebus_bus_match,
>  };
>  EXPORT_SYMBOL(ibmebus_bus_type);
>   
Doesn't that oops when called with the fake parent device ?

Either you do a wrapper that test for it (that's what I did when I
posted the patch).
Or, an even better approach is to add this

+	if (!ebus_dev->ofdev.node)
+		return -ENODEV;

inside the code of of_device_uevent itself.


	Sylvain



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