linux-kernel - Re: [PATCH] ARM: dma-mapping: add in missing white space in error message text

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Date:   Mon, 12 Sep 2016 15:52:03 +0100
From:   Colin Ian King <colin.king@...onical.com>
To:     Russell King - ARM Linux <linux@...linux.org.uk>,
        Robin Murphy <robin.murphy@....com>
Cc:     Vineet Gupta <vgupta@...opsys.com>,
        Hans-Christian Noren Egtvedt <egtvedt@...fundet.no>,
        Joerg Roedel <jroedel@...e.de>,
        Jesper Nilsson <jesper.nilsson@...s.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dma-mapping: add in missing white space in error
 message text

On 12/09/16 15:33, Russell King - ARM Linux wrote:
> On Mon, Sep 12, 2016 at 02:06:09PM +0100, Robin Murphy wrote:
>> On 12/09/16 13:52, Colin King wrote:
>>> From: Colin Ian King <colin.king@...onical.com>
>>>
>>> A dev_warn message spans two lines and the literal string is missing
>>> a white space between words. Add the white space.
>>>
>>> Signed-off-by: Colin Ian King <colin.king@...onical.com>
>>> ---
>>>  arch/arm/common/dmabounce.c | 2 +-
>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c
>>> index 3012816..f47767b 100644
>>> --- a/arch/arm/common/dmabounce.c
>>> +++ b/arch/arm/common/dmabounce.c
>>> @@ -547,7 +547,7 @@ void dmabounce_unregister_dev(struct device *dev)
>>>  
>>>  	if (!device_info) {
>>>  		dev_warn(dev,
>>> -			 "Never registered with dmabounce but attempting"
>>> +			 "Never registered with dmabounce but attempting "
>>>  			 "to unregister!\n");
>>
>> Per Documentation/CodingStyle, better to put the whole thing onto one
>> line so that, say, "git grep 'attempting to unregister'" doesn't leave
>> one scratching ones head in confusion.
>>
>> Of course, even better would be to get rid of the whole thing and
>> convert ARM to use SWIOTLB, but hey, one thing at a time ;)
> 
> I doubt that can happen - dmabounce does a little more than swiotlb
> because it copes with DMA masks that are _not_ a number of zeros
> followed by one bits.  It was written to support things like SA1111
> DMA, where the device has a bug in that it can't drive certain
> SDRAM address bits correctly.
> 
> It also gets used for ITE8512 PCI controllers and IXP4xx platforms,
> although these should probably be converted to SWIOTLB.  However,
> without having test systems, I'd recommend leaving them as-is.
> 
OK, nevermind this patch, drop it into /dev/null

Colin