linux-kernel - [PATCH] swiotlb: use depends on for DMA_RESTRICTED

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Date:   Fri, 27 Aug 2021 11:48:02 +0800
From:   Claire Chang <tientzu@...omium.org>
To:     hch@....de, m.szyprowski@...sung.com, robin.murphy@....com,
        konrad.wilk@...cle.com
Cc:     iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        linux@...ck-us.net, Claire Chang <tientzu@...omium.org>
Subject: [PATCH] swiotlb: use depends on for DMA_RESTRICTED_POOL

Use depends on instead of select for DMA_RESTRICTED_POOL; otherwise it
will make SWIOTLB user configurable and cause compile errors for some
arch (e.g. mips).

Fixes: 0b84e4f8b793 ("swiotlb: Add restricted DMA pool initialization")
Reported-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Claire Chang <tientzu@...omium.org>
---
 kernel/dma/Kconfig | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig
index fd4db714d86b..1b02179758cb 100644
--- a/kernel/dma/Kconfig
+++ b/kernel/dma/Kconfig
@@ -82,8 +82,7 @@ config SWIOTLB
 
 config DMA_RESTRICTED_POOL
 	bool "DMA Restricted Pool"
-	depends on OF && OF_RESERVED_MEM
-	select SWIOTLB
+	depends on OF && OF_RESERVED_MEM && SWIOTLB
 	help
 	  This enables support for restricted DMA pools which provide a level of
 	  DMA memory protection on systems with limited hardware protection
-- 
2.33.0.259.gc128427fd7-goog