linux-kernel - [PATCH] staging: pi433: using div64_u64() instead of do

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Date:   Fri, 21 Jan 2022 19:49:55 +0800
From:   Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
To:     gregkh@...uxfoundation.org
Cc:     linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>,
        Abaci Robot <abaci@...ux.alibaba.com>
Subject: [PATCH] staging: pi433: using div64_u64() instead of do_div()

Clean the following coccicheck warning:

./drivers/staging/pi433/rf69.c:286:1-7: WARNING: do_div() does a
64-by-32 division, please consider using div64_u64 instead.

./drivers/staging/pi433/rf69.c:332:1-7: WARNING: do_div() does a
64-by-32 division, please consider using div64_u64 instead.

Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>
---
 drivers/staging/pi433/rf69.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/pi433/rf69.c b/drivers/staging/pi433/rf69.c
index d64df072d8e8..ae4adeb00ce1 100644
--- a/drivers/staging/pi433/rf69.c
+++ b/drivers/staging/pi433/rf69.c
@@ -283,7 +283,7 @@ int rf69_set_deviation(struct spi_device *spi, u32 deviation)
 
 	// calculate register settings
 	f_reg = deviation * factor;
-	do_div(f_reg, f_step);
+	div64_u64(f_reg, f_step);
 
 	msb = (f_reg & 0xff00) >> 8;
 	lsb = (f_reg & 0xff);
@@ -329,7 +329,7 @@ int rf69_set_frequency(struct spi_device *spi, u32 frequency)
 
 	// calculate reg settings
 	f_reg = frequency * factor;
-	do_div(f_reg, f_step);
+	div64_u64(f_reg, f_step);
 
 	msb = (f_reg & 0xff0000) >> 16;
 	mid = (f_reg & 0xff00)   >>  8;
-- 
2.20.1.7.g153144c