Re: [PATCH v3] swiotlb: Make SWIOTLB_NO_FORCE perform no allocation

[Florian Fainelli]

On 3/24/2021 1:42 AM, Christoph Hellwig wrote:
> On Mon, Mar 22, 2021 at 06:53:49PM -0700, Florian Fainelli wrote:
>> When SWIOTLB_NO_FORCE is used, there should really be no allocations of
>> default_nslabs to occur since we are not going to use those slabs. If a
>> platform was somehow setting swiotlb_no_force and a later call to
>> swiotlb_init() was to be made we would still be proceeding with
>> allocating the default SWIOTLB size (64MB), whereas if swiotlb=noforce
>> was set on the kernel command line we would have only allocated 2KB.
>>
>> This would be inconsistent and the point of initializing default_nslabs
>> to 1, was intended to allocate the minimum amount of memory possible, so
>> simply remove that minimal allocation period.
>>
>> Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
> 
> Looks good,
> 
> Reviewed-by: Christoph Hellwig <hch@xxxxxx>
> 

Thanks! Konrad, can you apply this patch to your for-linus-5.13 branch
if you are also happy with it?
-- 
Florian