On Tue, Sep 29, 2026 at 06:00:27AM +0000, [email protected] wrote: > On architectures with a 256KB PAGE_SIZE (such as Hexagon or PowerPC), this > new validation evaluates to 65536 < 262144, unconditionally returning > -EINVAL and breaking all CPU mappings.
Right, the misc device has no dma_parms, so it gets the 64K default and sync fails with 256K pages The misc device has no real segment limit, so for v3 I'll give it dma_parms with an unlimited max segment size and keep the -EINVAL for importers that report a limit below PAGE_SIZE. Karl
