From: Srinath Mannam srinath.mannam@broadcom.com
[ Upstream commit 571f316074a203e979ea90211d9acf423dfe5f46 ]
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 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 --- drivers/iommu/dma-iommu.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 0cbcd3fc3e7e..840dd2b66ce7 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -216,9 +216,11 @@ 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; }