iommu sg merging: PCI: add dma segment boundary support

This adds PCI's accessor for segment_boundary_mask in device_dma_parameters.

The default segment_boundary is set to 0xffffffff, same to the block layer's
default value (and the scsi mid layer uses the same value).

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Greg KH <greg@kroah.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index f47d596d5ebc..4d23b9fb551b 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -937,6 +937,7 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
         dev->dev.coherent_dma_mask = 0xffffffffull;
 
         pci_set_dma_max_seg_size(dev, 65536);
+        pci_set_dma_seg_boundary(dev, 0xffffffff);
 
         /* Fix up broken headers */
         pci_fixup_device(pci_fixup_header, dev);