From: Christoph Hellwig <hch@lst.de>
Date: Thu, 5 Oct 2023 07:06:55 +0000 (+0200)
Subject: dma-direct: add dependencies to CONFIG_DMA_GLOBAL_POOL
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=da323d4640704001f2287f729124e1cd9d5684d0;p=linux.git

dma-direct: add dependencies to CONFIG_DMA_GLOBAL_POOL

CONFIG_DMA_GLOBAL_POOL can't be combined with other DMA coherent
allocators.  Add dependencies to Kconfig to document this, and make
kconfig complain about unmet dependencies if someone tries.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Greg Ungerer <gerg@linux-m68k.org>
Tested-by: Greg Ungerer <gerg@linux-m68k.org>
---

diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig
index f488997b07171..4524db877eba3 100644
--- a/kernel/dma/Kconfig
+++ b/kernel/dma/Kconfig
@@ -135,6 +135,8 @@ config DMA_COHERENT_POOL
 
 config DMA_GLOBAL_POOL
 	select DMA_DECLARE_COHERENT
+	depends on !ARCH_HAS_DMA_SET_UNCACHED
+	depends on !DMA_DIRECT_REMAP
 	bool
 
 config DMA_DIRECT_REMAP