[PATCH 2/2] Handle init_iova_flush_queue failure in dma-iommu path
From: Tom Murphy <hidden>
Date: 2020-08-17 21:20:22
Also in:
kvm, linux-arm-kernel, linux-arm-msm, linux-iommu, linux-mediatek, linux-rockchip, linux-s390, linux-samsung-soc, linux-tegra, lkml
Subsystem:
iommu dma-api layer, iommu subsystem, the rest · Maintainers:
Robin Murphy, Joerg Roedel, Will Deacon, Linus Torvalds
init_iova_flush_queue can fail if we run out of memory. Fall back to no flush queue if it fails. Signed-off-by: Tom Murphy <redacted> --- drivers/iommu/dma-iommu.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 7433f74d921a..5445e2be08b5 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c@@ -356,9 +356,11 @@ static int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base, if (!cookie->fq_domain && !iommu_domain_get_attr(domain, DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE, &attr) && attr) { - cookie->fq_domain = domain; - init_iova_flush_queue(iovad, iommu_dma_flush_iotlb_all, - iommu_dma_entry_dtor); + if (init_iova_flush_queue(iovad, iommu_dma_flush_iotlb_all, + iommu_dma_entry_dtor)) + pr_warn("iova flush queue initialization failed\n"); + else + cookie->fq_domain = domain; } if (!dev)
--
2.20.1
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