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Date: Thu, 19 Aug 2010 16:40:08 +0200 (CEST)
From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
cc: linux-sh@vger.kernel.org, Marin Mitov <mitov@issp.bas.bg>,
	=?ISO-8859-15?Q?Uwe_Kleine-K=F6nig?= <u.kleine-koenig@pengutronix.de>,
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	Greg Kroah-Hartman <gregkh@suse.de>,
	linux-arm-kernel@lists.infradead.org,
	Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Subject: [PATCH 2/5] DMA: dma_declare_coherent_memory() should return an
	error if unsupported
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diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index ce29b81..77ce97f 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -163,7 +163,7 @@ static inline int
 dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
 			    dma_addr_t device_addr, size_t size, int flags)
 {
-	return 0;
+	return -EINVAL;
 }
 
 static inline void