linux-kernel - nouveau nvaa clock missing break?

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Date:	Thu, 26 Dec 2013 11:51:22 -0800
From:	Kees Cook <keescook@...gle.com>
To:	Roy Spliet <rspliet@...ipso.eu>
Cc:	Ben Skeggs <bskeggs@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	dri-devel@...ts.freedesktop.org
Subject: nouveau nvaa clock missing break?

Hi,

Just curious if this code is missing a "break" or not...

/drivers/gpu/drm/nouveau/core/subdev/clock/nvaa.c: 373 in nvaa_clock_prog()

        switch (priv->vsrc) {
        case nv_clk_src_cclk:
                mast |= 0x00400000;
        default:
                nv_wr32(clk, 0x4600, priv->vdiv);
        }

Coverity noticed it as CID 1135671. If it's intentional, it might be
nice to add a "fall through" comment there.

Coverity also complained about read_pll (CID 1135670) where post_div
could (unlikely) be 0 and used for a divide-by-zero.

Thanks!

-Kees

-- 
Kees Cook
Chrome OS Security
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