linux-kernel - [PATCH] sparc32: add offset in pci_map

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Message-ID: <20061228184459.1c51a33b@localhost.localdomain>
Date:	Thu, 28 Dec 2006 18:44:59 +0100
From:	Jan Andersson <jan.andersson@...e.org>
To:	wli@...omorphy.com
Cc:	linux-kernel@...r.kernel.org, sparclinux@...r.kernel.org
Subject: [PATCH] sparc32: add offset in pci_map_sg()

From: Jan Andersson jan.andersson@...e.org

Add sg->offset to sg->dvma_address in pci_map_sg() on sparc32. Without
the offset, transfers to buffers that do not begin on a page boundary 
will not work as expected. 

Signed-off-by: Jan Andersson <jan.andersson@...e.org>
---

diff -uprN a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c
--- a/arch/sparc/kernel/ioport.c        2006-12-28 15:00:46.000000000 +0100
+++ b/arch/sparc/kernel/ioport.c        2006-12-28 16:22:40.000000000 +0100
@@ -728,7 +728,8 @@ int pci_map_sg(struct pci_dev *hwdev, st
        /* IIep is write-through, not flushing. */
        for (n = 0; n < nents; n++) {
                BUG_ON(page_address(sg->page) == NULL);
-               sg->dvma_address = virt_to_phys(page_address(sg->page));
+               sg->dvma_address = 
+                       virt_to_phys(page_address(sg->page)) + sg->offset;
                sg->dvma_length = sg->length;
                sg++;
        }
-
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