Re: [PATCH 1/5] SDIO: introduce API for special power management features

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On Tue, 09 Feb 2010 15:29:22 -0500
Nicolas Pitre <nico@xxxxxxxxxxx> wrote:

> +	BUG_ON(!func);
> +	BUG_ON(!func->card);
> +
> +	host = func->card->host;

It's a bit redundant to check for null and then deref the pointer - the
kernel will reliably oops on the NULL deref, which gives us the same
info.

I guess the BUG_ON is more useful in the case where a double-deref is
being performed, as it can otherwise be a bit hard to work out which
pointer was NULL.

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