Re: [PATCH] net: mvneta_bm: add suspend/resume to prevent crash after resume

[Andrew Lunn]

On Thu, Jun 11, 2026 at 10:09:35AM +0800, Yun Zhou wrote:
> The mvneta driver uses the hardware Buffer Manager (BM) for RX buffer
> allocation. During suspend, mvneta disables its clock, causing BM to
> lose all buffer address state. On resume, mvneta_bm_port_init() re-
> attaches the BM pool to the NIC, but BM hardware returns stale/garbage
> buffer addresses. When NAPI poll processes these buffers, DMA cache
> sync hits an invalid virtual address causing a kernel panic:

Has this never worked, or has something changed recently which broke
it?

	Andrew