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powerpc/iommu: fix memory leak with using debugfs_lookup()
When calling debugfs_lookup() the result must have dput() called on it, otherwise the memory will leak over time. To make things simpler, just call debugfs_lookup_and_remove() instead which handles all of the logic at once. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20230202141919.2298821-1-gregkh@linuxfoundation.org
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1 changed files with 1 additions and 3 deletions
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@ -67,11 +67,9 @@ static void iommu_debugfs_add(struct iommu_table *tbl)
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static void iommu_debugfs_del(struct iommu_table *tbl)
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{
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char name[10];
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struct dentry *liobn_entry;
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sprintf(name, "%08lx", tbl->it_index);
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liobn_entry = debugfs_lookup(name, iommu_debugfs_dir);
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debugfs_remove(liobn_entry);
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debugfs_lookup_and_remove(name, iommu_debugfs_dir);
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}
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#else
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static void iommu_debugfs_add(struct iommu_table *tbl){}
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