linux-kernel - Re: [PATCH 3/3] DMA: PL330: Balance module remove function with probe

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CABb+yY1qbs_s7a-rb91wehEUbO1Azax+-PCaH2QQ=gr+Mc5ioA@mail.gmail.com>
Date:	Thu, 27 Sep 2012 21:36:25 +0530
From:	Jassi Brar <jassisinghbrar@...il.com>
To:	Inderpal Singh <inderpal.singh@...aro.org>
Cc:	Vinod Koul <vinod.koul@...ux.intel.com>,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	boojin.kim@...sung.com, patches@...aro.org, kgene.kim@...sung.com
Subject: Re: [PATCH 3/3] DMA: PL330: Balance module remove function with probe

On Thu, Sep 27, 2012 at 9:11 PM, Inderpal Singh
<inderpal.singh@...aro.org> wrote:
> On 27 September 2012 15:18, Vinod Koul <vinod.koul@...ux.intel.com> wrote:
>> On Wed, 2012-09-26 at 12:11 +0530, Inderpal Singh wrote:
>>> If we fail pl330_remove while some client is queued, the force unload
>>> will fail and the
>>> force unload will lose its purpose.
>>> How about conditionally DMA_TERMINATE_ALL and free resources like
>>> below ?
>> Why would you want to remove the driver when it is doing something
>> useful? You have to ensure driver is not doing anything.
>>
>> What is point here?
>>
> As mentioned by jassi,  if the pl330 module is forced unloaded while
> some client is queued, we have to manually do DMA_TERMINATE_ALL.
>
I meant that in the current situation. Not ideally.

> If failing remove is a better option in case some client is queued, we
> can do away with DMA_TERMINATE_ALL and free_chan_resources and simply
> return a suitable error code from remove.
>
That was exactly what I suggested as an alternative.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/