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Commit f6019271 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

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



Avoid any tries to double-free these pointers.

Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 151b0903

drivers/iommu/amd_iommu_init.c

+5 −0
Original line number Diff line number Diff line
@@ -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();

}