linux-kernel - Re: [PATCHv2] iommu/arm-smmu: Make remove callback message more informative

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Date:   Thu, 7 May 2020 11:33:38 +0100
From:   Robin Murphy <robin.murphy@....com>
To:     Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Doug Anderson <dianders@...omium.org>,
        Will Deacon <will@...nel.org>
Cc:     Joerg Roedel <joro@...tes.org>, iommu@...ts.linux-foundation.org,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCHv2] iommu/arm-smmu: Make remove callback message more
 informative

On 2020-05-07 11:04 am, Sai Prakash Ranjan wrote:
> Hi,
> 
> On 2020-05-07 05:40, Doug Anderson wrote:
>> Hi,
>>
>> On Thu, Apr 23, 2020 at 7:35 AM Doug Anderson <dianders@...omium.org> 
>> wrote:
>>>
>>> Hi,
>>>
>>> On Thu, Apr 23, 2020 at 2:55 AM Sai Prakash Ranjan
>>> <saiprakash.ranjan@...eaurora.org> wrote:
>>> >
>>> > Currently on reboot/shutdown, the following messages are
>>> > displayed on the console as error messages before the
>>> > system reboots/shutdown as part of remove callback.
>>> >
>>> > On SC7180:
>>> >
>>> >   arm-smmu 15000000.iommu: removing device with active domains!
>>> >   arm-smmu 5040000.iommu: removing device with active domains!
>>> >
>>> > Make this error message more informative and less scary.
>>> >
>>> > Reported-by: Douglas Anderson <dianders@...omium.org>
>>> > Suggested-by: Robin Murphy <robin.murphy@....com>
>>> > Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
>>> > ---
>>> >  drivers/iommu/arm-smmu.c | 2 +-
>>> >  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> Reviewed-by: Douglas Anderson <dianders@...omium.org>
>>
>> Is this patch waiting on anything in particular now?  Do we need
>> reviews from Robin and/or Will?
>>
> 
> Waiting for their reviews as they are the maintainers/reviewers :)

Sorry, this did register at the time, I just felt that it's a bit 
redundant to give a review tag to say "yes, this is exactly what I 
suggested" :)

That said, I do wish I hadn't forgotten about the dev_notice message 
level, but I think that lies over in the conceptual purity corner rather 
than making any practical difference, so I'm still OK with the patch 
as-is. Will?

Robin.


p.s. whoever has this entry in their address book for the IOMMU list 
(Doug?):

"list@....net:IOMMU DRIVERS <iommu@...ts.linux-foundation.org>, Joerg 
Roedel <joro@...tes.org>," <iommu@...ts.linux-foundation.org>

it really messes up Thunderbird's ability to generate working headers 
for a reply ;)