linux-kernel - [4.4-stable 16/22] dmaengine: zx: fix build warning

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Date:   Tue, 20 Feb 2018 12:55:03 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     stable@...r.kernel.org
Cc:     Greg KH <gregkh@...uxfoundation.org>, linux-kernel@...r.kernel.org,
        Jun Nie <jun.nie@...aro.org>,
        Vinod Koul <vinod.koul@...el.com>,
        Arnd Bergmann <arnd@...db.de>,
        Dan Williams <dan.j.williams@...el.com>,
        Shawn Guo <shawn.guo@...aro.org>,
        Sasha Levin <alexander.levin@...izon.com>,
        dmaengine@...r.kernel.org
Subject: [4.4-stable 16/22] dmaengine: zx: fix build warning

From: Jun Nie <jun.nie@...aro.org>

commit 067fdeb2f391bfa071f741a2b3eb74b8ff3785cd upstream.

Fix build warning that related to PAGE_SIZE. The maximum DMA
length has nothing to do with PAGE_SIZE, just use a fix number
for the definition.

drivers/dma/zx_dma.c: In function 'zx_dma_prep_memcpy':
drivers/dma/zx_dma.c:523:8: warning: division by zero [-Wdiv-by-zero]
drivers/dma/zx_dma.c: In function 'zx_dma_prep_slave_sg':
drivers/dma/zx_dma.c:567:11: warning: division by zero [-Wdiv-by-zero]

Signed-off-by: Jun Nie <jun.nie@...aro.org>
Tested-by: Shawn Guo <shawn.guo@...aro.org>
Signed-off-by: Vinod Koul <vinod.koul@...el.com>
[arnd: rebased to 4.4-stable]
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/dma/zx296702_dma.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/zx296702_dma.c b/drivers/dma/zx296702_dma.c
index 6059d81e701a..8e55403847b2 100644
--- a/drivers/dma/zx296702_dma.c
+++ b/drivers/dma/zx296702_dma.c
@@ -26,7 +26,7 @@
 
 #define DRIVER_NAME		"zx-dma"
 #define DMA_ALIGN		4
-#define DMA_MAX_SIZE		(0x10000 - PAGE_SIZE)
+#define DMA_MAX_SIZE		(0x10000 - 512)
 #define LLI_BLOCK_SIZE		(4 * PAGE_SIZE)
 
 #define REG_ZX_SRC_ADDR			0x00
-- 
2.9.0