Re: [PATCH RESEND 6/6] clk: s5p-g2d: Fix incorrect usage ofIS_ERR_OR_NULL

From: Julia Lawall
Date: Wed Jan 02 2013 - 04:44:27 EST

On Wed, 2 Jan 2013, Russell King - ARM Linux wrote:

> On Wed, Jan 02, 2013 at 08:10:36AM +0300, Dan Carpenter wrote:
> > clk_get() returns NULL if CONFIG_HAVE_CLK is disabled.
> >
> > I told Tony about this but everyone has been gone with end of year
> > holidays so it hasn't been addressed.
> >
> > Tony, please fix it so people don't apply these patches until
> > clk_get() is updated to not return NULL. It sucks to have to revert
> > patches.
> How about people stop using IS_ERR_OR_NULL for stuff which it shouldn't
> be used for?

Perhaps the cases where clk_get returns NULL could have a comment
indicating that NULL does not represent a failure?

In 3.7.1, it looks like it might have been possible for NULL to be
returned by clk_get in arch/mips/loongson1/common/clock.c, but that
definition seems to be gone in a recent linux-next. The remaining
definitions look OK.

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