linux-kernel - [PATCH 3/4] iommu: constify fwnode in iommu_ops_from

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Date: Fri, 16 Feb 2024 15:40:26 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Hector Martin <marcan@...can.st>,
	Sven Peter <sven@...npeter.dev>,
	Alyssa Rosenzweig <alyssa@...enzweig.io>,
	Joerg Roedel <joro@...tes.org>,
	Will Deacon <will@...nel.org>,
	Robin Murphy <robin.murphy@....com>,
	Rob Clark <robdclark@...il.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	Alim Akhtar <alim.akhtar@...sung.com>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Yong Wu <yong.wu@...iatek.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Heiko Stuebner <heiko@...ech.de>,
	Orson Zhai <orsonzhai@...il.com>,
	Baolin Wang <baolin.wang@...ux.alibaba.com>,
	Chunyan Zhang <zhang.lyra@...il.com>,
	Chen-Yu Tsai <wens@...e.org>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Samuel Holland <samuel@...lland.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Krishna Reddy <vdumpa@...dia.com>,
	Jonathan Hunter <jonathanh@...dia.com>,
	Jean-Philippe Brucker <jean-philippe@...aro.org>,
	asahi@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	iommu@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org,
	linux-mediatek@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-sunxi@...ts.linux.dev,
	linux-tegra@...r.kernel.org,
	virtualization@...ts.linux.dev
Subject: [PATCH 3/4] iommu: constify fwnode in iommu_ops_from_fwnode()

Make pointer to fwnode_handle a pointer to const for code safety.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 drivers/iommu/iommu.c | 2 +-
 include/linux/iommu.h | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 26a31ba4f72d..a1f9bb8fa041 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -2987,7 +2987,7 @@ bool iommu_default_passthrough(void)
 }
 EXPORT_SYMBOL_GPL(iommu_default_passthrough);
 
-const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
+const struct iommu_ops *iommu_ops_from_fwnode(const struct fwnode_handle *fwnode)
 {
 	const struct iommu_ops *ops = NULL;
 	struct iommu_device *iommu;
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 600fc6e6f308..269ef0af7f20 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -903,7 +903,7 @@ int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
 		      const struct iommu_ops *ops);
 void iommu_fwspec_free(struct device *dev);
 int iommu_fwspec_add_ids(struct device *dev, const u32 *ids, int num_ids);
-const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
+const struct iommu_ops *iommu_ops_from_fwnode(const struct fwnode_handle *fwnode);
 
 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
 {
@@ -1253,7 +1253,7 @@ static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids,
 }
 
 static inline
-const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
+const struct iommu_ops *iommu_ops_from_fwnode(const struct fwnode_handle *fwnode)
 {
 	return NULL;
 }
-- 
2.34.1