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iommu/dma: Fix IOVA reserve dma ranges
[ Upstream commit571f316074
] Fix IOVA reserve failure in the case when address of first memory region listed in dma-ranges is equal to 0x0. Fixes:aadad097cd
("iommu/dma: Reserve IOVA for PCIe inaccessible DMA address") Signed-off-by: Srinath Mannam <srinath.mannam@broadcom.com> Reviewed-by: Robin Murphy <robin.murphy@arm.com> Tested-by: Sven Peter <sven@svenpeter.dev> Link: https://lore.kernel.org/r/20200914072319.6091-1-srinath.mannam@broadcom.com Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 4 additions and 2 deletions
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@ -216,9 +216,11 @@ static int iova_reserve_pci_windows(struct pci_dev *dev,
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lo = iova_pfn(iovad, start);
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hi = iova_pfn(iovad, end);
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reserve_iova(iovad, lo, hi);
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} else {
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} else if (end < start) {
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/* dma_ranges list should be sorted */
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dev_err(&dev->dev, "Failed to reserve IOVA\n");
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dev_err(&dev->dev,
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"Failed to reserve IOVA [%#010llx-%#010llx]\n",
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start, end);
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return -EINVAL;
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}
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