From 90833fdab89da02fc0276224167f0a42e5176f41 Mon Sep 17 00:00:00 2001
From: Jared Hulbert <jaredeh@gmail.com>
Date: Wed, 22 Aug 2007 17:38:25 +0100
Subject: [PATCH] [ARM] 4554/1: replace consistent_sync() with
 flush_ioremap_region()

This fixes a regression from around 2.6.18, consistent_sync() will now BUG()
under these circumstances.  The use of consistent_sync() was a hack, replacing
it's usage here with a new function, flush_ioremap_region().

Signed-off-by: Jared Hulbert <jaredeh@gmail.com>
Acked-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/mtd/maps/lubbock-flash.c   | 6 ++----
 drivers/mtd/maps/mainstone-flash.c | 5 ++---
 include/asm-arm/cacheflush.h       | 7 +++++++
 3 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/mtd/maps/lubbock-flash.c b/drivers/mtd/maps/lubbock-flash.c
index 1aa0447c5e6..e8560683b97 100644
--- a/drivers/mtd/maps/lubbock-flash.c
+++ b/drivers/mtd/maps/lubbock-flash.c
@@ -15,9 +15,7 @@
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
-#include <linux/slab.h>
 
-#include <linux/dma-mapping.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/map.h>
 #include <linux/mtd/partitions.h>
@@ -26,7 +24,7 @@
 #include <asm/hardware.h>
 #include <asm/arch/pxa-regs.h>
 #include <asm/arch/lubbock.h>
-
+#include <asm/cacheflush.h>
 
 #define ROM_ADDR	0x00000000
 #define FLASH_ADDR	0x04000000
@@ -35,7 +33,7 @@
 
 static void lubbock_map_inval_cache(struct map_info *map, unsigned long from, ssize_t len)
 {
-	consistent_sync((char *)map->cached + from, len, DMA_FROM_DEVICE);
+	flush_ioremap_region(map->phys, map->cached, from, len);
 }
 
 static struct map_info lubbock_maps[2] = { {
diff --git a/drivers/mtd/maps/mainstone-flash.c b/drivers/mtd/maps/mainstone-flash.c
index eaa4bbb868a..d76487d82dc 100644
--- a/drivers/mtd/maps/mainstone-flash.c
+++ b/drivers/mtd/maps/mainstone-flash.c
@@ -15,8 +15,6 @@
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
-#include <linux/dma-mapping.h>
-#include <linux/slab.h>
 
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/map.h>
@@ -26,6 +24,7 @@
 #include <asm/hardware.h>
 #include <asm/arch/pxa-regs.h>
 #include <asm/arch/mainstone.h>
+#include <asm/cacheflush.h>
 
 
 #define ROM_ADDR	0x00000000
@@ -36,7 +35,7 @@
 static void mainstone_map_inval_cache(struct map_info *map, unsigned long from,
 				      ssize_t len)
 {
-	consistent_sync((char *)map->cached + from, len, DMA_FROM_DEVICE);
+	flush_ioremap_region(map->phys, map->cached, from, len);
 }
 
 static struct map_info mainstone_maps[2] = { {
diff --git a/include/asm-arm/cacheflush.h b/include/asm-arm/cacheflush.h
index d1294a46c70..6c1c968b298 100644
--- a/include/asm-arm/cacheflush.h
+++ b/include/asm-arm/cacheflush.h
@@ -426,6 +426,13 @@ static inline void flush_anon_page(struct vm_area_struct *vma,
  */
 #define flush_icache_page(vma,page)	do { } while (0)
 
+static inline void flush_ioremap_region(unsigned long phys, void __iomem *virt,
+	unsigned offset, size_t size)
+{
+	const void *start = (void __force *)virt + offset;
+	dmac_inv_range(start, start + size);
+}
+
 #define __cacheid_present(val)			(val != read_cpuid(CPUID_ID))
 #define __cacheid_type_v7(val)			((val & (7 << 29)) == (4 << 29))
 
-- 
2.46.0