linux-kernel - Re: [PATCH] nouveau reclocking on nv40 not working since 77145f1cbdf8d28b46ff8070ca749bad821e0774

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Message-ID: <520DFD9F.1070006@labri.fr>
Date:	Fri, 16 Aug 2013 06:23:27 -0400
From:	Martin Peres <martin.peres@...ri.fr>
To:	Pali Rohár <pali.rohar@...il.com>
CC:	David Airlie <airlied@...ux.ie>, dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org, Ben Skeggs <bskeggs@...hat.com>
Subject: Re: [PATCH] nouveau reclocking on nv40 not working since 77145f1cbdf8d28b46ff8070ca749bad821e0774

On 16/08/2013 03:16, Pali Rohár wrote:
> On Thursday 15 August 2013 18:23:06 Martin Peres wrote:
>> On 15/08/2013 13:46, Pali Rohár wrote:
>>> On Tuesday 13 August 2013 11:28:01 Pali Rohár wrote:
>>>> Hello,
>>>>
>>>> in commit 77145f1cbdf8d28b46ff8070ca749bad821e0774 was
>>>> introduced error which cause that on my Nvidia 6600GT card
>>>> reclocking not working anymore. There is missing assigment of
>>>> return value from pll_calc to ret.
>>>>
>>>> After this patch reclocking on my card working fine again.
>>>> Above broken commit was introduced in kernel 3.7, so consider
>>>> backporting this patch to older kernels too.
>>>>
>>>> Signed-off-by: Pali Rohár <pali.rohar@...il.com>
>>>>
>>>> diff --git a/drivers/gpu/drm/nouveau/nv40_pm.c
>>>> b/drivers/gpu/drm/nouveau/nv40_pm.c index 3af5bcd..625f80d
>>>> 100644
>>>> --- a/drivers/gpu/drm/nouveau/nv40_pm.c
>>>> +++ b/drivers/gpu/drm/nouveau/nv40_pm.c
>>>> @@ -131,7 +131,7 @@ nv40_calc_pll(struct drm_device *dev, u32
>>>> reg, struct nvbios_pll *pll, if (clk < pll->vco1.max_freq)
>>>>
>>>>    		pll->vco2.max_freq = 0;
>>>>
>>>> -	pclk->pll_calc(pclk, pll, clk, &coef);
>>>> +	ret = pclk->pll_calc(pclk, pll, clk, &coef);
>>>>
>>>>    	if (ret == 0)
>>>>    	
>>>>    		return -ERANGE;
>>> Martin, can you look at another problem with my graphics card?
>> As I told you before, I'm away from my computers, so I cannot test the
>> patch. However,
>> this one seems quite obvious and should be pushed. Thanks.
> Yes, look at that diff of that problematic commit and you will see that ret
> here is missing. It is possible to push this patch to 3.11?
Please make a proper patch (generated by git format-patch or git 
send-email) and
Ben will push it.

You add my Signed-off-by: Martin Peres <martin.peres@...ri.fr>

Cheers
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