linux-kernel - Re: [PATCH] staging: android: ion: Initialize dma

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Message-ID: <alpine.DEB.2.02.1802160945020.20374@lmark-linux.qualcomm.com>
Date:   Fri, 16 Feb 2018 09:45:28 -0800 (PST)
From:   Liam Mark <lmark@...eaurora.org>
To:     Laura Abbott <labbott@...hat.com>
cc:     Dan Carpenter <dan.carpenter@...cle.com>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        devel@...verdev.osuosl.org, linaro-mm-sig@...ts.linaro.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: android: ion: Initialize dma_address of new sg
 list

On Thu, 15 Feb 2018, Laura Abbott wrote:

> On 02/12/2018 01:25 PM, Liam Mark wrote:
> > 
> > On Mon, 12 Feb 2018, Dan Carpenter wrote:
> > 
> > > On Fri, Feb 09, 2018 at 10:16:56PM -0800, Liam Mark wrote:
> > > > Fix the dup_sg_table function to initialize the dma_address of the new
> > > > sg list entries instead of the source dma_address entries.
> > > > 
> > > > Fixes: 17fd283f3870 ("staging: android: ion: Duplicate sg_table")
> > > > Signed-off-by: Liam Mark <lmark@...eaurora.org>
> > > 
> > > How did you find this bug?  What are the user visible effects of this
> > > bug?  I'm probably going to ask you to send a v2 patch with a new
> > > changelog depending on the answers to these questions.
> > 
> > I noticed the bug when reading through the code, I haven?t seen any
> > visible effects of this bug.
> > 
> >  From looking at the code I don?t see any obvious ways that this bug
> would
> > introduce any issues with the current code base.
> > 
> > Liam
> > 
> 
> Given the way we duplicate the sg_list this should be harmless but you
> are right it's cleaner if we initialize the new list. You can add my
> Ack when you update with a new change log clarifying this.
> 
> Thanks,
> Laura
> 

Will do.

Thanks,
Liam

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