iommu/tegra: smmu: Fix unsleepable memory allocation (8f53dc72) · Commits · 戴 / test

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:

Chris Wright <chrisw@sous-sol.org> Cc: stable@vger.kernel.org Signed-off-by:

drivers/iommu/tegra-smmu.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -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");