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From: Joerg Roedel <joro@8bytes.org>
To: iommu@lists.linux-foundation.org
Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	linux-mediatek@lists.infradead.org, guohanjun@huawei.com,
	Sudeep Holla <sudeep.holla@arm.com>,
	Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
	Will Deacon <will@kernel.org>,
	Robin Murphy <robin.murphy@arm.com>,
	Joerg Roedel <joro@8bytes.org>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	Jean-Philippe Brucker <jean-philippe@linaro.org>,
	Andy Gross <agross@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Joerg Roedel <jroedel@suse.de>
Subject: [PATCH v4 07/16] iommu/arm-smmu: Fix uninitilized variable warning
Date: Thu, 26 Mar 2020 16:08:32 +0100
Message-ID: <20200326150841.10083-8-joro@8bytes.org> (raw)
In-Reply-To: <20200326150841.10083-1-joro@8bytes.org>

From: Joerg Roedel <jroedel@suse.de>

Some unrelated changes in the iommu code caused a new warning to
appear in the arm-smmu driver:

  CC      drivers/iommu/arm-smmu.o
drivers/iommu/arm-smmu.c: In function 'arm_smmu_add_device':
drivers/iommu/arm-smmu.c:1441:2: warning: 'smmu' may be used uninitialized in this function [-Wmaybe-uninitialized]
  arm_smmu_rpm_put(smmu);
  ^~~~~~~~~~~~~~~~~~~~~~

The warning is a false positive, but initialize the variable to NULL
to get rid of it.

Tested-by: Will Deacon <will@kernel.org> # arm-smmu
Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/arm-smmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 16c4b87af42b..980aae73b45b 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1383,7 +1383,7 @@ struct arm_smmu_device *arm_smmu_get_by_fwnode(struct fwnode_handle *fwnode)
 
 static int arm_smmu_add_device(struct device *dev)
 {
-	struct arm_smmu_device *smmu;
+	struct arm_smmu_device *smmu = NULL;
 	struct arm_smmu_master_cfg *cfg;
 	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
 	int i, ret;
-- 
2.17.1


  parent reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-26 15:08 [PATCH v4 00/16] iommu: Move iommu_fwspec out of 'struct device' Joerg Roedel
2020-03-26 15:08 ` [PATCH v4 01/16] iommu: Define dev_iommu_fwspec_get() for !CONFIG_IOMMU_API Joerg Roedel
2020-03-26 15:08 ` [PATCH v4 02/16] ACPI/IORT: Remove direct access of dev->iommu_fwspec Joerg Roedel
2020-03-27  3:30   ` Hanjun Guo
2020-03-27  8:45     ` Jean-Philippe Brucker
2020-03-26 15:08 ` [PATCH v4 03/16] drm/msm/mdp5: " Joerg Roedel
2020-03-26 15:08 ` [PATCH v4 04/16] iommu/tegra-gart: " Joerg Roedel
2020-03-26 15:08 ` [PATCH v4 05/16] iommu: Rename struct iommu_param to dev_iommu Joerg Roedel
2020-03-26 15:12   ` Greg Kroah-Hartman
2020-03-26 15:08 ` [PATCH v4 06/16] iommu: Move iommu_fwspec to struct dev_iommu Joerg Roedel
2020-03-26 15:12   ` Greg Kroah-Hartman
2020-03-26 15:08 ` Joerg Roedel [this message]
2020-03-26 15:08 ` [PATCH v4 08/16] iommu: Introduce accessors for iommu private data Joerg Roedel
2020-03-26 15:08 ` [PATCH v4 09/16] iommu/arm-smmu-v3: Use accessor functions " Joerg Roedel
2020-03-26 15:08 ` [PATCH v4 10/16] iommu/arm-smmu: Refactor master_cfg/fwspec usage Joerg Roedel
2020-03-26 15:08 ` [PATCH v4 11/16] iommu/arm-smmu: Use accessor functions for iommu private data Joerg Roedel
2020-03-26 15:08 ` [PATCH v4 12/16] iommu/renesas: " Joerg Roedel
2020-03-26 15:08 ` [PATCH v4 13/16] iommu/mediatek: " Joerg Roedel
2020-03-26 15:08 ` [PATCH v4 14/16] iommu/qcom: " Joerg Roedel
2020-03-26 15:08 ` [PATCH v4 15/16] iommu/virtio: " Joerg Roedel
2020-03-26 15:08 ` [PATCH v4 16/16] iommu: Move fwspec->iommu_priv to struct dev_iommu Joerg Roedel
2020-03-27 10:16 ` [PATCH v4 00/16] iommu: Move iommu_fwspec out of 'struct device' Joerg Roedel

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