linux-kernel - [PATCH -mm 3/7] pci: convert pci_set_dma_mask to call dma_set

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Date:	Fri, 12 Feb 2010 18:33:28 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, fujita.tomonori@....ntt.co.jp,
	James Bottomley <James.Bottomley@...e.de>,
	"David S. Miller" <davem@...emloft.net>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Russell King <linux@....linux.org.uk>
Subject: [PATCH -mm 3/7] 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@....ntt.co.jp>
Cc: James Bottomley <James.Bottomley@...e.de>
Cc: David S. Miller <davem@...emloft.net>
Cc: Jesse Barnes <jbarnes@...tuousgeek.org>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Russell King <linux@....linux.org.uk>
---
 drivers/pci/pci.c |   10 ++++------
 1 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 315fea4..5c881e9 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -2121,15 +2121,13 @@ 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)
 {
-- 
1.5.6.5

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