From 87c5cd316e368c734e46e192c172e6d3091a7e7e Mon Sep 17 00:00:00 2001 From: Sebastian Ott Date: Fri, 3 Jun 2016 19:03:12 +0200 Subject: [PATCH] s390/pci: ensure page aligned dma start address We don't have an architectural guarantee on the value of the dma offset but rely on it to be at least page aligned. Enforce page alignemt of start_dma. Signed-off-by: Sebastian Ott Reviewed-by: Gerald Schaefer Signed-off-by: Martin Schwidefsky --- arch/s390/pci/pci_dma.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/s390/pci/pci_dma.c b/arch/s390/pci/pci_dma.c index 1ea8c07eab849..494eb832bcc53 100644 --- a/arch/s390/pci/pci_dma.c +++ b/arch/s390/pci/pci_dma.c @@ -469,6 +469,7 @@ int zpci_dma_init_device(struct zpci_dev *zdev) * Also set zdev->end_dma to the actual end address of the usable * range, instead of the theoretical maximum as reported by hardware. */ + zdev->start_dma = PAGE_ALIGN(zdev->start_dma); zdev->iommu_size = min3((u64) high_memory, ZPCI_TABLE_SIZE_RT - zdev->start_dma, zdev->end_dma - zdev->start_dma + 1); -- 2.39.5