[PATCH 08/60][SRU][OEM-5.6] iommu/arm-smmu: Fix uninitilized variable warning
You-Sheng Yang
vicamo.yang at canonical.com
Tue May 26 13:01:12 UTC 2020
From: Joerg Roedel <jroedel at suse.de>
BugLink: https://bugs.launchpad.net/bugs/1876707
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.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
Tested-by: Will Deacon <will at kernel.org> # arm-smmu
Reviewed-by: Jean-Philippe Brucker <jean-philippe at linaro.org>
Link: https://lore.kernel.org/r/20200326150841.10083-8-joro@8bytes.org
(cherry picked from commit 0b242ebbb7fca818323d02d2bbb08ff7d425f594)
Signed-off-by: You-Sheng Yang <vicamo.yang at canonical.com>
---
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;
--
2.25.1
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