From 178783622ce0fd629fad21b33b8f8f56b64c5e45 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Sun, 3 Jul 2011 23:24:21 +0100
Subject: [PATCH] ARM: dmabounce: fix map_single() error return value
When map_single() is unable to obtain a safe buffer, we must return
the dma_addr_t error value, which is ~0 rather than 0.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
arch/arm/common/dmabounce.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c
index e5681636626f..841df7d21c2f 100644
--- a/arch/arm/common/dmabounce.c
+++ b/arch/arm/common/dmabounce.c
@@ -255,7 +255,7 @@ static inline dma_addr_t map_single(struct device *dev, void *ptr, size_t size,
if (buf == 0) {
dev_err(dev, "%s: unable to map unsafe buffer %p!\n",
__func__, ptr);
- return 0;
+ return ~0;
}
dev_dbg(dev,