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From fc0402a5515d72d27012c931cc405dc860b0e043 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Tue, 14 Jul 2015 11:11:51 +0100
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Subject: [PATCH 120/222] vchiq_arm: Sort out the vmalloc case
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See: https://github.com/raspberrypi/linux/issues/1055
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---
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.../misc/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c | 10 +++++-----
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1 file changed, 5 insertions(+), 5 deletions(-)
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--- a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
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+++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
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@@ -394,21 +394,21 @@ create_pagelist(char __user *buf, size_t
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if (is_vmalloc_addr(buf)) {
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int dir = (type == PAGELIST_WRITE) ?
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DMA_TO_DEVICE : DMA_FROM_DEVICE;
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- unsigned long length = pagelist->length;
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- unsigned int offset = pagelist->offset;
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+ unsigned long length = count;
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+ unsigned int off = offset;
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for (actual_pages = 0; actual_pages < num_pages;
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actual_pages++) {
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struct page *pg = vmalloc_to_page(buf + (actual_pages *
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PAGE_SIZE));
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- size_t bytes = PAGE_SIZE - offset;
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+ size_t bytes = PAGE_SIZE - off;
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if (bytes > length)
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bytes = length;
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pages[actual_pages] = pg;
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- dmac_map_area(page_address(pg) + offset, bytes, dir);
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+ dmac_map_area(page_address(pg) + off, bytes, dir);
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length -= bytes;
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- offset = 0;
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+ off = 0;
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}
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*need_release = 0; /* do not try and release vmalloc pages */
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} else {
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