linux-kernel - Re: [PATCH] omapfb: dss: Handle return error in dss_init

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Message-ID: <ef0e2b40-b0c9-aa86-fe99-2edd23daa155@gmail.com>
Date:   Thu, 9 Feb 2017 15:32:58 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:     tomi.valkeinen@...com, linux-omap@...r.kernel.org,
        linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] omapfb: dss: Handle return error in dss_init_ports.

Hi,
Yes, We will have to handle cleanup of partially initialized ports.
As per your suggestion, I have done the changes.

Thanks
-Arvind

On Wednesday 08 February 2017 07:51 PM, Bartlomiej Zolnierkiewicz wrote:
> On Wednesday, February 08, 2017 11:25:47 AM Bartlomiej Zolnierkiewicz wrote:
>> Hi,
>>
>> On Tuesday, February 07, 2017 05:41:37 PM Arvind Yadav wrote:
>>> Hi,
>>>
>>> In dss_init_ports, There is no need to add dss_uninit_ports before
>>> returning.
>>> Because it's already take care in dss_bind. dss_bind  is handling
>>> dss_uninit_ports in error path.
>> It doesn't handle cleanup of partially initialized ports,
> BTW by "partially initialized ports" here I mean cases like
> i.e. dpi port fully initialized and sdi one not initialized
>
>> please look at the code:
>>
>> ...
>> 	r = dss_init_ports(pdev);
>> 	if (r)
>> 		goto err_init_ports;
>> ...
>> err_runtime_get:
>> 	pm_runtime_disable(&pdev->dev);
>> 	dss_uninit_ports(pdev);
>> err_init_ports:
>> 	if (dss.video1_pll)
>> 		dss_video_pll_uninit(dss.video1_pll);
>> ...
>>
>> dss_uninit_ports() is not called on partially initialized
> ditto
>
>> ports (when dss_init_ports() returns an error we go straight
>> into err_init_ports label and skip dss_uninit_ports())
>>
>>> -Arvind
>>>
>>>
>>> On Monday 06 February 2017 08:58 PM, Bartlomiej Zolnierkiewicz wrote:
>>>> dpi_uninit_port() & sdi_uninit_port() skip not fully
>>>> initialized port
> Best regards,
> --
> Bartlomiej Zolnierkiewicz
> Samsung R&D Institute Poland
> Samsung Electronics
>