linux-kernel - [PATCH 04/15] ASoC: samsung-idma: avoid 64-bit division

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Message-Id: <1398770316-19715-5-git-send-email-kaixu.xia@linaro.org>
Date:	Tue, 29 Apr 2014 19:18:25 +0800
From:	Xia Kaixu <kaixu.xia@...aro.org>
To:	linux-kernel@...r.kernel.org
Cc:	linaro-kernel@...ts.linaro.org, arnd@...db.de,
	kaixu.xia@...aro.org, Mark Brown <broonie@...nel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Ben Dooks <ben-linux@...ff.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Sangbeom Kim <sbkim73@...sung.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, alsa-devel@...a-project.org
Subject: [PATCH 04/15] ASoC: samsung-idma: avoid 64-bit division

From: Arnd Bergmann <arnd@...db.de>

dma_addr_t may be 64 bit wide, which causes a build failure
when doing a division on it. Here it is safe to cast to an
u32 type, which avoids the problem.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Xia Kaixu <kaixu.xia@...aro.org>
Cc: Mark Brown <broonie@...nel.org>
Cc: Liam Girdwood <lgirdwood@...il.com>
Cc: Ben Dooks <ben-linux@...ff.org>
Cc: Kukjin Kim <kgene.kim@...sung.com>
Cc: Sangbeom Kim <sbkim73@...sung.com>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-samsung-soc@...r.kernel.org
Cc: alsa-devel@...a-project.org
---
 sound/soc/samsung/idma.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/samsung/idma.c b/sound/soc/samsung/idma.c
index 3d5cf15..e9891b4 100644
--- a/sound/soc/samsung/idma.c
+++ b/sound/soc/samsung/idma.c
@@ -274,7 +274,7 @@ static irqreturn_t iis_irq(int irqno, void *dev_id)
 
 		addr = readl(idma.regs + I2SLVL0ADDR) - idma.lp_tx_addr;
 		addr += prtd->periodsz;
-		addr %= (prtd->end - prtd->start);
+		addr %= (u32)(prtd->end - prtd->start);
 		addr += idma.lp_tx_addr;
 
 		writel(addr, idma.regs + I2SLVL0ADDR);
-- 
1.7.9.5

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