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drivers: timer: stm32 lptim fix Potentially overflow

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Fix Unintentional integer overflow in the calculation
Integer handling issues (OVERFLOW_BEFORE_WIDEN)
Potentially overflowing expression

Signed-off-by: Francois Ramu <francois.ramu@st.com>
This commit is contained in:
Francois Ramu 2021-01-07 09:46:31 +01:00 committed by Anas Nashif
parent 7712caa1a7
commit 1280e9817c
1 changed files with 2 additions and 2 deletions
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4
drivers/timer/stm32_lptim_timer.c
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@ -291,7 +291,7 @@ uint32_t z_clock_elapsed(void)
/* gives the value of LPTIM1 counter (ms)
* since the previous 'announce'
*/
uint64_t ret = (lp_time * CONFIG_SYS_CLOCK_TICKS_PER_SEC) / LPTIM_CLOCK;
uint64_t ret = ((uint64_t)lp_time * CONFIG_SYS_CLOCK_TICKS_PER_SEC) / LPTIM_CLOCK;
return (uint32_t)(ret);
}
@ -315,7 +315,7 @@ uint32_t z_timer_cycle_get_32(void)
lp_time += accumulated_lptim_cnt;
/* convert lptim count in a nb of hw cycles with precision */
uint64_t ret = lp_time * (sys_clock_hw_cycles_per_sec() / LPTIM_CLOCK);
uint64_t ret = ((uint64_t)lp_time * sys_clock_hw_cycles_per_sec()) / LPTIM_CLOCK;
k_spin_unlock(&lock, key);