On Tue, Jun 11, 2019 at 10:58:23AM -0700, Florian Fainelli wrote:
> Hi Christoph,
I pulled the patches in my tree.
>
> Still with my contrived memory layout where there is no physical memory
> the kernel can use below 4GB, it was possible to fail swiotlb_init(),
> but still not hit swiotlb_map_single() since all peripherals have a
> DMA_BIT_MASK() that is within the remaining addressable physical memory.
>
> The second path could be backported to stable, but for the same reasons
> as the one we had just discussed before, this requires a very contrived
> test case that is not necessarily realistic or would warrant a stable
> backport IMHO.
>
> Thanks!
>
> Florian Fainelli (2):
> swiotlb: Group identical cleanup in swiotlb_cleanup()
> swiotlb: Return consistent SWIOTLB segments/nr_tbl
>
> kernel/dma/swiotlb.c | 26 ++
> 1 file changed, 14 insertions(+), 12 deletions(-)
>
> --
> 2.17.1
>
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