From: Jan Andersson <jan.andersson@ieee.org>
Date: Sat, 30 Dec 2006 00:50:04 +0000 (-0800)
Subject: [PATCH] sparc32: add offset in pci_map_sg()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=dbc1333a347745bd55844649c19eb7d28f383a84;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[PATCH] sparc32: add offset in pci_map_sg()

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@ieee.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: William Lee Irwin III <wli@holomorphy.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c
index cbbc98846b00..00a39760877b 100644
--- a/arch/sparc/kernel/ioport.c
+++ b/arch/sparc/kernel/ioport.c
@@ -726,7 +726,8 @@ int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents,
 	/* 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++;
 	}