linux-kernel - [PATCH 4.4 145/193] dmaengine: zx: fix build warning

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Date:   Fri, 23 Feb 2018 19:26:18 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jun Nie <jun.nie@...aro.org>,
        Shawn Guo <shawn.guo@...aro.org>,
        Vinod Koul <vinod.koul@...el.com>
Subject: [PATCH 4.4 145/193] dmaengine: zx: fix build warning

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/dma/zx296702_dma.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 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