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powerpc/pseries/iommu: Use correct vfree for it_map 

The it_map array is vzalloc'ed so use vfree() for it when creating
a huge DMA window failed for whatever reason.

While at this, write zero to it_map.

Fixes: 381ceda88c ("powerpc/pseries/iommu: Make use of DDW for indirect mapping")
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211020132315.2287178-3-aik@ozlabs.ru
This commit is contained in:
Alexey Kardashevskiy 2021-10-21 00:23:13 +11:00 committed by Michael Ellerman
parent 787252a10d
commit 41ee7232fa
1 changed files with 2 additions and 1 deletions
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3
arch/powerpc/platforms/pseries/iommu.c
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@ -1440,7 +1440,8 @@ static bool enable_ddw(struct pci_dev *dev, struct device_node *pdn)
/* Keep default DMA window stuct if removed */
if (default_win_removed) {
tbl->it_size = 0;
kfree(tbl->it_map);
vfree(tbl->it_map);
tbl->it_map = NULL;
}
set_iommu_table_base(&dev->dev, newtbl);