From: Srinath Mannam Date: Mon, 14 Sep 2020 12:53:19 +0530 Subject: iommu/dma: Fix IOVA reserve dma ranges Git-commit: 571f316074a203e979ea90211d9acf423dfe5f46 Patch-mainline: v5.14-rc1 References: bsc#1189214 Fix IOVA reserve failure in the case when address of first memory region listed in dma-ranges is equal to 0x0. Fixes: aadad097cd46f ("iommu/dma: Reserve IOVA for PCIe inaccessible DMA address") Signed-off-by: Srinath Mannam Reviewed-by: Robin Murphy Tested-by: Sven Peter Link: https://lore.kernel.org/r/20200914072319.6091-1-srinath.mannam@broadcom.com Signed-off-by: Joerg Roedel --- drivers/iommu/dma-iommu.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -217,9 +217,11 @@ resv_iova: lo = iova_pfn(iovad, start); hi = iova_pfn(iovad, end); reserve_iova(iovad, lo, hi); - } else { + } else if (end < start) { /* dma_ranges list should be sorted */ - dev_err(&dev->dev, "Failed to reserve IOVA\n"); + dev_err(&dev->dev, + "Failed to reserve IOVA [%#010llx-%#010llx]\n", + start, end); return -EINVAL; }