linux-kernel - [PATCH 04/12] dma-mapping: fix DMA

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Date:   Tue,  8 Sep 2020 18:47:50 +0200
From:   Christoph Hellwig <hch@....de>
To:     Tony Luck <tony.luck@...el.com>, Fenghua Yu <fenghua.yu@...el.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        iommu@...ts.linux-foundation.org
Cc:     Tomasz Figa <tfiga@...omium.org>, Joerg Roedel <joro@...tes.org>,
        Robin Murphy <robin.murphy@....com>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-ia64@...r.kernel.org,
        linux-mips@...r.kernel.org
Subject: [PATCH 04/12] dma-mapping: fix DMA_OPS dependencies

Driver that select DMA_OPS need to depend on HAS_DMA support to
work.  The vop driver was missing that dependency, so add it, and also
add a nother depends in DMA_OPS itself.  That won't fix the issue due
to how the Kconfig dependencies work, but at least produce a warning
about unmet dependencies.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 drivers/misc/mic/Kconfig | 1 +
 kernel/dma/Kconfig       | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/misc/mic/Kconfig b/drivers/misc/mic/Kconfig
index b9bb086785db48..8a7c2c5711d5f4 100644
--- a/drivers/misc/mic/Kconfig
+++ b/drivers/misc/mic/Kconfig
@@ -35,6 +35,7 @@ config SCIF_BUS
 
 config VOP_BUS
 	tristate "VOP Bus Driver"
+	depends on HAS_DMA
 	select DMA_OPS
 	help
 	  This option is selected by any driver which registers a
diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig
index 0ddfb5510fe45f..e7b801649f6574 100644
--- a/kernel/dma/Kconfig
+++ b/kernel/dma/Kconfig
@@ -9,6 +9,7 @@ config HAS_DMA
 	default y
 
 config DMA_OPS
+	depends on HAS_DMA
 	bool
 
 #
-- 
2.28.0