linux-kernel - Re: [PATCH for-next v3] RDMA/core: Avoid hmm_dma_map

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Message-Id: <174815946854.1055673.18158398913709776499.b4-ty@kernel.org>
Date: Sun, 25 May 2025 03:51:08 -0400
From: Leon Romanovsky <leon@...nel.org>
To: linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org, jgg@...pe.ca, 
 zyjzyj2000@...il.com, Daisuke Matsuda <dskmtsd@...il.com>
Cc: hch@...radead.org
Subject: Re: [PATCH for-next v3] RDMA/core: Avoid hmm_dma_map_alloc() for
 virtual DMA devices


On Sat, 24 May 2025 14:43:28 +0000, Daisuke Matsuda wrote:
> Drivers such as rxe, which use virtual DMA, must not call into the DMA
> mapping core since they lack physical DMA capabilities. Otherwise, a NULL
> pointer dereference is observed as shown below. This patch ensures the RDMA
> core handles virtual and physical DMA paths appropriately.
> 
> This fixes the following kernel oops:
> 
> [...]

Applied, thanks!

[1/1] RDMA/core: Avoid hmm_dma_map_alloc() for virtual DMA devices
      https://git.kernel.org/rdma/rdma/c/5071e94f47af42

Best regards,
-- 
Leon Romanovsky <leon@...nel.org>