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iommu/amd: Set global pointers to NULL after freeing them 

Avoid any tries to double-free these pointers.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2017-06-16 16:09:58 +02:00
parent 151b09031a
commit f601927136
1 changed files with 5 additions and 0 deletions
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5
drivers/iommu/amd_iommu_init.c
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@ -2114,18 +2114,22 @@ static void __init free_iommu_resources(void)
kmemleak_free(irq_lookup_table);
free_pages((unsigned long)irq_lookup_table,
get_order(rlookup_table_size));
irq_lookup_table = NULL;
kmem_cache_destroy(amd_iommu_irq_cache);
amd_iommu_irq_cache = NULL;
free_pages((unsigned long)amd_iommu_rlookup_table,
get_order(rlookup_table_size));
amd_iommu_rlookup_table = NULL;
free_pages((unsigned long)amd_iommu_alias_table,
get_order(alias_table_size));
amd_iommu_alias_table = NULL;
free_pages((unsigned long)amd_iommu_dev_table,
get_order(dev_table_size));
amd_iommu_dev_table = NULL;
free_iommu_all();
@ -2195,6 +2199,7 @@ static void __init free_dma_resources(void)
{
free_pages((unsigned long)amd_iommu_pd_alloc_bitmap,
get_order(MAX_DOMAIN_ID/8));
amd_iommu_pd_alloc_bitmap = NULL;
free_unity_maps();
}