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Message-Id: <20221019053829.821918-1-tegongkang@gmail.com>
Date: Wed, 19 Oct 2022 14:38:29 +0900
From: Kang Minchul <tegongkang@...il.com>
To: Lars-Peter Clausen <lars@...afoo.de>,
Michael Hennerich <Michael.Hennerich@...log.com>,
Jonathan Cameron <jic23@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-iio@...r.kernel.org, linux-staging@...ts.linux.dev,
linux-kernel@...r.kernel.org, Kang Minchul <tegongkang@...il.com>
Subject: [PATCH] staging: iio: Use div64_ul instead of do_div
Using div64_ul instead of do_div (64-by-32 division) is more
recommended by coccicheck because this can avoid potential truncation.
So this commit changes do_div to div64_ul and
remove coccicheck warnings.
Signed-off-by: Kang Minchul <tegongkang@...il.com>
---
drivers/staging/iio/frequency/ad9832.c | 2 +-
drivers/staging/iio/frequency/ad9834.c | 2 +-
drivers/staging/iio/impedance-analyzer/ad5933.c | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/iio/frequency/ad9832.c b/drivers/staging/iio/frequency/ad9832.c
index 6f9eebd6c7ee..cd038480f63c 100644
--- a/drivers/staging/iio/frequency/ad9832.c
+++ b/drivers/staging/iio/frequency/ad9832.c
@@ -122,7 +122,7 @@ static unsigned long ad9832_calc_freqreg(unsigned long mclk, unsigned long fout)
{
unsigned long long freqreg = (u64)fout *
(u64)((u64)1L << AD9832_FREQ_BITS);
- do_div(freqreg, mclk);
+ freqreg = div64_ul(freqreg, mclk);
return freqreg;
}
diff --git a/drivers/staging/iio/frequency/ad9834.c b/drivers/staging/iio/frequency/ad9834.c
index 2b4267a87e65..cfe933ef40d0 100644
--- a/drivers/staging/iio/frequency/ad9834.c
+++ b/drivers/staging/iio/frequency/ad9834.c
@@ -102,7 +102,7 @@ static unsigned int ad9834_calc_freqreg(unsigned long mclk, unsigned long fout)
{
unsigned long long freqreg = (u64)fout * (u64)BIT(AD9834_FREQ_BITS);
- do_div(freqreg, mclk);
+ freqreg = div64_ul(freqreg, mclk);
return freqreg;
}
diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c b/drivers/staging/iio/impedance-analyzer/ad5933.c
index f177b20f0f2d..730bb31a20d8 100644
--- a/drivers/staging/iio/impedance-analyzer/ad5933.c
+++ b/drivers/staging/iio/impedance-analyzer/ad5933.c
@@ -196,7 +196,7 @@ static int ad5933_set_freq(struct ad5933_state *st,
} dat;
freqreg = (u64)freq * (u64)(1 << 27);
- do_div(freqreg, st->mclk_hz / 4);
+ freqreg = div64_ul(freqreg, st->mclk_hz / 4);
switch (reg) {
case AD5933_REG_FREQ_START:
--
2.34.1
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