linux-kernel - Re: [PATCH] checkpatch: Warn on comparisons to true and false

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Date:	Thu, 11 Apr 2013 07:25:15 -0700
From:	Joe Perches <joe@...ches.com>
To:	Bjørn Mork <bjorn@...k.no>
Cc:	Dave Jones <davej@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andy Whitcroft <apw@...dowen.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Jacob Pan <jacob.jun.pan@...ux.intel.com>
Subject: Re: [PATCH] checkpatch: Warn on comparisons to true and false

On Thu, 2013-04-11 at 13:56 +0200, Bjørn Mork wrote:
> I felt I had to share this little gem
> which showed up in drivers/gpu/drm/exynos/exynos_drm_vidi.c:
> 
> static int vidi_power_on(struct vidi_context *ctx, bool enable)
> {
>         struct exynos_drm_subdrv *subdrv = &ctx->subdrv;
>         struct device *dev = subdrv->dev;
> 
>         DRM_DEBUG_KMS("%s\n", __FILE__);
> 
>         if (enable != false && enable != true)
>                 return -EINVAL;
> ..
> That's taking failsafe to the next step :)

Cute.  It's a relatively new driver too so I'd guess
the "int -> bool conversion leftover" defense isn't
too likely.

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