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[Deepin-Kernel-SIG] [linux 6.6-y] [Upstream] ACPI: OSL: Use usleep_range() in acpi_os_sleep() #676

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Merged
opsiff merged 1 commit into from
Mar 24, 2025
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[Deepin-Kernel-SIG] [linux 6.6-y] [Upstream] ACPI: OSL: Use usleep_range() in acpi_os_sleep() #676

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22 changes: 21 additions & 1 deletion drivers/acpi/osl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -610,7 +610,27 @@ acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler)

void acpi_os_sleep(u64 ms)
{
msleep(ms);
u64 usec = ms * USEC_PER_MSEC, delta_us = 50;

/*
* Use a hrtimer because the timer wheel timers are optimized for
* cancelation before they expire and this timer is not going to be
* canceled.
*
* Set the delta between the requested sleep time and the effective
* deadline to at least 50 us in case there is an opportunity for timer
* coalescing.
*
* Moreover, longer sleeps can be assumed to need somewhat less timer
* precision, so sacrifice some of it for making the timer a more likely
* candidate for coalescing by setting the delta to 1% of the sleep time
* if it is above 5 ms (this value is chosen so that the delta is a
* continuous function of the sleep time).
*/
if (ms > 5)
delta_us = (USEC_PER_MSEC / 100) * ms;

usleep_range(usec, usec + delta_us);
}

void acpi_os_stall(u32 us)
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