linux-kernel - Re: [RFC, PATCH 1/4] SoC base drivers: SoC helper API

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Date:	Tue, 1 May 2007 20:08:03 +0100
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	Paul Sokolovsky <pmiscml@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [RFC, PATCH 1/4] SoC base drivers: SoC helper API

On Tue, May 01, 2007 at 08:08:27AM +0300, Paul Sokolovsky wrote:
> +void soc_free_devices(struct platform_device *devices, int nr_devs)
> +{
> +	struct platform_device *dev = devices;
> +	int i;
> +
> +	for (i = 0; i < nr_devs; i++) {
> +		struct resource *res = dev->resource;
> +		platform_device_unregister(dev++);
> +		kfree(res);
> +	}
> +	kfree(devices);

Utterly unsafe.  Repeat after me: kfreeing the memory assocated with any
kobject is asking for an OOPS.  Do not do it.

There's a reason that platform_device_alloc() and friends exist.  If you
want to unregister platform devices, use those functions.  Don't try to
invent your own buggy variants.

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