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s390/sclp: Use monotonic clock in sclp_sync_wait()

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sclp_sync_wait() should use the monotonic clock for the delay loop.
Otherwise the code won't work correctly when the clock is changed.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This commit is contained in:
Sven Schnelle 2025-07-10 09:43:40 +02:00 committed by Alexander Gordeev
parent e12570c985
commit 925f0707a6
1 changed files with 2 additions and 2 deletions
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4
drivers/s390/char/sclp.c
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@ -720,7 +720,7 @@ sclp_sync_wait(void)
timeout = 0;
if (timer_pending(&sclp_request_timer)) {
/* Get timeout TOD value */
timeout = get_tod_clock_fast() +
timeout = get_tod_clock_monotonic() +
sclp_tod_from_jiffies(sclp_request_timer.expires -
jiffies);
}
@ -740,7 +740,7 @@ sclp_sync_wait(void)
/* Loop until driver state indicates finished request */
while (sclp_running_state != sclp_running_state_idle) {
/* Check for expired request timer */
if (get_tod_clock_fast() > timeout && timer_delete(&sclp_request_timer))
if (get_tod_clock_monotonic() > timeout && timer_delete(&sclp_request_timer))
sclp_request_timer.function(&sclp_request_timer);
cpu_relax();
}