dma-mapping: pci: convert pci_set_dma_mask to call dma_set_mask

This changes pci_set_dma_mask to call the generic DMA API, dma_set_mask.

pci_set_dma_mask (in drivers/pci/pci.c) does the same things that
dma_set_mask does on all the architectures that use pci_set_dma_mask;
calls dma_supprted and sets dev->dma_mask.  So we safely change
pci_set_dma_mask to simply call dma_set_mask.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: James Bottomley <James.Bottomley@suse.de>
Cc: David S. Miller <davem@davemloft.net>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Greg KH <greg@kroah.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 6 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index fdcf01af6762..b2d23d1b0d41 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2305,15 +2305,13 @@ void pci_msi_off(struct pci_dev *dev)
 int
 pci_set_dma_mask(struct pci_dev *dev, u64 mask)
 {
-        if (!pci_dma_supported(dev, mask))
-                return -EIO;
-
-        dev->dma_mask = mask;
+        int ret = dma_set_mask(&dev->dev, mask);
+        if (ret)
+                return ret;
         dev_dbg(&dev->dev, "using %dbit DMA mask\n", fls64(mask));
-
         return 0;
 }
-    
+
 int
 pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
 {