diff options
| author | Alex Shi <alex.shi@linaro.org> | 2017-11-30 12:03:38 +0800 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2017-11-30 12:03:38 +0800 |
| commit | 1184d6e8873282bcb4ba1d57da1cdd423a0f42d6 (patch) | |
| tree | 66bf3b45f218c738312d40e90c52f25069709892 /arch/arm64/mm/dma-mapping.c | |
| parent | 382ac60c32998318f133b8b84030aa83a8f600fe (diff) | |
| parent | 4e22accddef27103c4fba20b9613b7bf52129be6 (diff) | |
Merge remote-tracking branch 'rt-stable/v4.9-rt' into linux-linaro-lsk-v4.9-rtlsk-v4.9-17.11-rt
Diffstat (limited to 'arch/arm64/mm/dma-mapping.c')
| -rw-r--r-- | arch/arm64/mm/dma-mapping.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c index b5bf46ce873b..cab3574ab7d9 100644 --- a/arch/arm64/mm/dma-mapping.c +++ b/arch/arm64/mm/dma-mapping.c @@ -836,14 +836,21 @@ static bool do_iommu_attach(struct device *dev, const struct iommu_ops *ops, * then the IOMMU core will have already configured a group for this * device, and allocated the default domain for that group. */ - if (!domain || iommu_dma_init_domain(domain, dma_base, size, dev)) { - pr_warn("Failed to set up IOMMU for device %s; retaining platform DMA ops\n", - dev_name(dev)); - return false; + if (!domain) + goto out_err; + + if (domain->type == IOMMU_DOMAIN_DMA) { + if (iommu_dma_init_domain(domain, dma_base, size, dev)) + goto out_err; + + dev->archdata.dma_ops = &iommu_dma_ops; } - dev->archdata.dma_ops = &iommu_dma_ops; return true; +out_err: + pr_warn("Failed to set up IOMMU for device %s; retaining platform DMA ops\n", + dev_name(dev)); + return false; } static void queue_iommu_attach(struct device *dev, const struct iommu_ops *ops, |