linux-kernel - [PATCH v2 0/4] dma-pool: Fix atomic pool selection

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Date:   Tue, 14 Jul 2020 14:39:24 +0200
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     hch@....de, linux-kernel@...r.kernel.org
Cc:     linux-rpi-kernel@...ts.infradead.org, jeremy.linton@....com,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Robin Murphy <robin.murphy@....com>,
        David Rientjes <rientjes@...gle.com>,
        iommu@...ts.linux-foundation.org
Subject: [PATCH v2 0/4] dma-pool: Fix atomic pool selection

This is my attempt at fixing one of the regressions we've seen[1] after
the introduction of per-zone atomic pools.

This combined with "dma-pool: Do not allocate pool memory from CMA"[2]
should fix the boot issues on Jeremy's RPi4 setup.

[1] https://lkml.org/lkml/2020/7/2/974
[2] https://lkml.org/lkml/2020/7/8/1108

---

Changes since v1:
 - Rebase into linus' master

Nicolas Saenz Julienne (4):
  dma-direct: Provide function to check physical memory area validity
  dma-pool: Get rid of dma_in_atomic_pool()
  dma-pool: Introduce dma_guess_pool()
  dma-pool: Make sure atomic pool suits device

 include/linux/dma-direct.h |  1 +
 kernel/dma/direct.c        |  2 +-
 kernel/dma/pool.c          | 80 +++++++++++++++++++++++++-------------
 3 files changed, 56 insertions(+), 27 deletions(-)

-- 
2.27.0