linux-kernel - [PATCH 1/1] dmaengine: mv_xor_v2: use {lower,upper}_32

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Date:   Tue, 24 Jul 2018 16:40:30 +0300
From:   <hannah@...vell.com>
To:     <dan.j.williams@...el.com>, <vkoul@...nel.org>,
        <dmaengine@...r.kernel.org>
CC:     <thomas.petazzoni@...tlin.com>, <linux-kernel@...r.kernel.org>,
        <nadavh@...vell.com>, <omrii@...vell.com>, <oferh@...vell.com>,
        <gregory.clement@...tlin.com>, Hanna Hawa <hannah@...vell.com>
Subject: [PATCH 1/1] dmaengine: mv_xor_v2: use {lower,upper}_32_bits to configure HW descriptor address

From: Hanna Hawa <hannah@...vell.com>

>> drivers/dma/mv_xor_v2.c:647:36: sparse: constant 0xFFFF00000000 is so big it is long
   include/linux/device.h:678:13: sparse: undefined identifier '__builtin_mul_overflow'
   include/linux/device.h:678:13: sparse: call with no type!

Use lower_32_bits and upper_32_bits to set the hw_desq address, instead of
using constant.

Signed-off-by: Hanna Hawa <hannah@...vell.com>
---
 drivers/dma/mv_xor_v2.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/mv_xor_v2.c b/drivers/dma/mv_xor_v2.c
index d41d916..8dc0aa4 100644
--- a/drivers/dma/mv_xor_v2.c
+++ b/drivers/dma/mv_xor_v2.c
@@ -642,9 +642,9 @@ static int mv_xor_v2_descq_init(struct mv_xor_v2_device *xor_dev)
 	       xor_dev->dma_base + MV_XOR_V2_DMA_DESQ_SIZE_OFF);
 
 	/* write the DESQ address to the DMA enngine*/
-	writel(xor_dev->hw_desq & 0xFFFFFFFF,
+	writel(lower_32_bits(xor_dev->hw_desq),
 	       xor_dev->dma_base + MV_XOR_V2_DMA_DESQ_BALR_OFF);
-	writel((xor_dev->hw_desq & 0xFFFF00000000) >> 32,
+	writel(upper_32_bits(xor_dev->hw_desq),
 	       xor_dev->dma_base + MV_XOR_V2_DMA_DESQ_BAHR_OFF);
 
 	/*
-- 
1.9.1