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34 lines
1.3 KiB
Diff
34 lines
1.3 KiB
Diff
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From 78b75ab3f8c9dfac563b81105a1b838ec37a940e Mon Sep 17 00:00:00 2001
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From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Date: Sun, 13 Oct 2019 10:55:15 +0100
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Subject: [PATCH] iio: chemical: sps30: Explicity truncate constant by masking
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When breaking up a constant to write to two 8 bit registers
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it isn't obvious to sparse that it was intentional.
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CHECK drivers/iio/chemical/sps30.c
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drivers/iio/chemical/sps30.c:120:30: warning: cast truncates bits from constant value (8004 becomes 4)
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So in the interests of minimising noisy warnings, let us add
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a mask.
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Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Acked-by: Tomasz Duszynski <tduszyns@gmail.com>
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---
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drivers/iio/chemical/sps30.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/drivers/iio/chemical/sps30.c b/drivers/iio/chemical/sps30.c
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index edbb956e81e8..acb9f8ecbb3d 100644
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--- a/drivers/iio/chemical/sps30.c
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+++ b/drivers/iio/chemical/sps30.c
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@@ -117,7 +117,7 @@ static int sps30_do_cmd(struct sps30_state *state, u16 cmd, u8 *data, int size)
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break;
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case SPS30_READ_AUTO_CLEANING_PERIOD:
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buf[0] = SPS30_AUTO_CLEANING_PERIOD >> 8;
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- buf[1] = (u8)SPS30_AUTO_CLEANING_PERIOD;
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+ buf[1] = (u8)(SPS30_AUTO_CLEANING_PERIOD & 0xff);
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/* fall through */
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case SPS30_READ_DATA_READY_FLAG:
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case SPS30_READ_DATA:
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