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iommu/tegra: smmu: Fix unsleepable memory allocation

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allo_pdir() is called in smmu_iommu_domain_init() with spin_lock
held. memory allocations in it have to be atomic/unsleepable.

Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com>
Reported-by: Chris Wright <chrisw@sous-sol.org>
Acked-by: Chris Wright <chrisw@sous-sol.org>
Cc: stable@vger.kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Hiroshi DOYU 2012-06-27 12:54:01 +03:00 committed by Joerg Roedel
parent ac1534a55d
commit 8f53dc724a
1 changed files with 2 additions and 2 deletions
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4
drivers/iommu/tegra-smmu.c
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@ -550,13 +550,13 @@ static int alloc_pdir(struct smmu_as *as)
return 0;
as->pte_count = devm_kzalloc(smmu->dev,
sizeof(as->pte_count[0]) * SMMU_PDIR_COUNT, GFP_KERNEL);
sizeof(as->pte_count[0]) * SMMU_PDIR_COUNT, GFP_ATOMIC);
if (!as->pte_count) {
dev_err(smmu->dev,
"failed to allocate smmu_device PTE cunters\n");
return -ENOMEM;
}
as->pdir_page = alloc_page(GFP_KERNEL | __GFP_DMA);
as->pdir_page = alloc_page(GFP_ATOMIC | __GFP_DMA);
if (!as->pdir_page) {
dev_err(smmu->dev,
"failed to allocate smmu_device page directory\n");