On Sat, 21 May 2022 10:44:30 -0700 Jakub Kicinski wrote: > > Well, I say the contrary. > > > > On the mainline the patch may be applied as is, it won't harm. > > > > However, it is gets applied to kernel 4.9 (based on the fixes: tag), it > > will break the driver for at least powerpc 8xx. > > I see, we should make a note of that in the commit message so it doesn't > get sucked into stable. > > > I don't know how SWIOTLB works or even what it is, does any of the > > microcontrollers embedding freescale ethernet uses that at all ? > > AFAIU SWIOTLB basically forces the use of bounce buffers even if the > device can reach the entire DRAM. I think some people also use it for > added security? IDK. I mostly use it to check if I'm using the DMA API > "right" :)
If what I said makes sense please repost the patch, the current version has been dropped from patchwork already.
