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iommu: return error code when it can't get group

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Although iommu_group_get() in iommu_probe_device() will always succeed
thanks to __iommu_probe_device() creating the group if it's not present,
it's still worth initialising 'ret' to -ENODEV in case this path is
reachable in the future.

For now, this patch results in no functional change.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20201126133825.3643852-1-yangyingliang@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Yang Yingliang 2020-11-26 21:38:25 +08:00 committed by Will Deacon
parent 6243f572a1
commit 058236eef6
1 changed files with 3 additions and 1 deletions
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4
drivers/iommu/iommu.c
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@ -253,8 +253,10 @@ int iommu_probe_device(struct device *dev)
goto err_out;
group = iommu_group_get(dev);
if (!group)
if (!group) {
ret = -ENODEV;
goto err_release;
}
/*
* Try to allocate a default domain - needs support from the