Re: [PATCH net-next v5 16/19] xsk: allow drivers to retain DMA mappings independently of pools
From: Björn Töpel
Date: Mon Sep 28 2026 - 08:34:55 EST
James Hilliard <james.hilliard1@xxxxxxxxx> writes:
> An unsuccessful device shutdown does not make its DMA memory safe to
> unmap.
Why does this need an AF_XDP API? Can stmmac fence DMA before releasing
the pool? Please show a case where stop and reset fail, DMA remains
active, and the driver cannot isolate it.
Björn