linux-kernel - RE: [RFC] sdhci: fix DMA leaks [was: [SHDCI] Heavy (thousands) DMA leaks]

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Date:	Tue, 25 Aug 2015 01:50:13 +0000
From:	Chen Bough <Haibo.Chen@...escale.com>
To:	Laura Abbott <labbott@...hat.com>, Jiri Slaby <jslaby@...e.cz>,
	"Ulf Hansson" <ulf.hansson@...aro.org>
CC:	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	"Linux kernel mailing list" <linux-kernel@...r.kernel.org>
Subject: RE: [RFC] sdhci: fix DMA leaks [was: [SHDCI] Heavy (thousands) DMA
 leaks]

Hi Laura,

You can find the patch here:
http://patchwork.kernerl.xyz/patch/6967161/

I will send this patch again and cc to you.


Best regards

Haibo



> -----Original Message-----
> From: Laura Abbott [mailto:labbott@...hat.com]
> Sent: Tuesday, August 25, 2015 12:27 AM
> To: Chen Haibo-B51421; Jiri Slaby; Ulf Hansson
> Cc: linux-mmc@...r.kernel.org; Linux kernel mailing list
> Subject: Re: [RFC] sdhci: fix DMA leaks [was: [SHDCI] Heavy (thousands)
> DMA leaks]
> 
> On 08/06/2015 02:17 AM, Chen Bough wrote:
> > I will format a patch based on your diff file firstly. I will test
> > this on my side, If any issue, like dma issue or performance issue, I
> will add some modification.
> > Then I will send the patch for review, and you can test the patch on
> your platform.
> >
> > Best Regards
> > Haibo Chen
> >
> 
> Did I miss the follow up patch or is this still pending? If it's still
> pending, would you mind Ccing me when it's available for testing?
> 
> Thanks,
> Laura
> 
> >
> >> -----Original Message-----
> >> From: Jiri Slaby [mailto:jslaby@...e.cz]
> >> Sent: Thursday, August 06, 2015 5:07 PM
> >> To: Chen Haibo-B51421; Ulf Hansson
> >> Cc: linux-mmc@...r.kernel.org; Linux kernel mailing list
> >> Subject: Re: [RFC] sdhci: fix DMA leaks [was: [SHDCI] Heavy
> >> (thousands) DMA leaks]
> >>
> >> On 08/06/2015, 09:42 AM, Chen Bough wrote:
> >>> I read your attached log and patch, yes, dma memory leak will happen
> >>> when more than one pre_request execute. The method of ++next->cookie
> >>> is not good, your patch seems good, but I still need some time to
> >>> test the patch, because you unmap the dma in sdhci_finish_data
> >>> rather than
> >> the sdhci_post_req.
> >>
> >> Hi,
> >>
> >> yes, this is not correct. We can perhaps differentiate according to
> >> the COOKIE value. Should I fix it or are you going to prepare a patch
> >> based on my RFC?
> >>
> >> thanks,
> >> --
> >> js
> >> suse labs