Subject: Re: [PATCH v5 1/6] iommu: add generic boot option iommu.dma_mode

From: "Leizhen (ThunderTown)" <[email-masked]>
Date: Tue, 23 Apr 2019 10:45:37 +0800

On 2019/4/12 19:16, Joerg Roedel wrote:
> On Tue, Apr 09, 2019 at 08:53:03PM +0800, Zhen Lei wrote:
>> +static int __init iommu_dma_mode_setup(char *str)
>> +{
>> +	if (!str)
>> +		goto fail;
>> +
>> +	if (!strncmp(str, "passthrough", 11))
>> +		iommu_default_dma_mode = IOMMU_DMA_MODE_PASSTHROUGH;
>> +	else if (!strncmp(str, "lazy", 4))
>> +		iommu_default_dma_mode = IOMMU_DMA_MODE_LAZY;
>> +	else if (!strncmp(str, "strict", 6))
>> +		iommu_default_dma_mode = IOMMU_DMA_MODE_STRICT;
>> +	else
>> +		goto fail;
>> +
>> +	pr_info("Force dma mode to be %d\n", iommu_default_dma_mode);
> 
> Printing a number is not very desriptive or helpful to the user. Please
> print the name of the mode instead.

OK, thanks. I have given up adding iommu.dma_mode boot option according
to Robin and Will's suggestion. So these codes will be removed in v6.

> Regards,
> 	Joerg
> .

-- 
Thanks!
BestRegards