Commit 53b1bc9a authored by Sebastian Ott's avatar Sebastian Ott Committed by Martin Schwidefsky
Browse files

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: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Reviewed-by: default avatarGerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent bb98f396

arch/s390/pci/pci_dma.c

+1 −0
Original line number Diff line number Diff line
@@ -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);