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iio: hrtimer-trigger: Fix potential integer overflow in iio_hrtimer_store_sampling_frequency 

Add suffix ULL to constant 1000 in order to avoid a potential integer
overflow and give the compiler complete information about the proper
arithmetic to use. Notice that this constant is being used in a context
that expects an expression of type unsigned long long, but it's
currently evaluated using 32-bit arithmetic.

Addresses-Coverity-ID: 1503062 ("Unintentional integer overflow")
Fixes: dafcf4ed83 ("iio: hrtimer: Allow sub Hz granularity")
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20210329205817.GA188755@embeddedor
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Gustavo A. R. Silva 2021-03-29 15:58:17 -05:00 committed by Jonathan Cameron
parent 4d84487d96
commit c10f8109f7
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/trigger/iio-trig-hrtimer.c
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@ -63,7 +63,7 @@ ssize_t iio_hrtimer_store_sampling_frequency(struct device *dev,
if (integer < 0 || fract < 0)
return -ERANGE;
val = fract + 1000 * integer; /* mHz */
val = fract + 1000ULL * integer; /* mHz */
if (!val || val > UINT_MAX)
return -EINVAL;