The following commit has been merged into the timers/urgent branch of tip:

Commit-ID: f2655ac2c06a15558e51ed6529de280e1553c86e Gitweb: https://git.kernel.org/tip/f2655ac2c06a15558e51ed6529de280e1553c86e Author: Paul E. McKenney paulmck@kernel.org AuthorDate: Fri, 02 Aug 2024 08:46:15 -07:00 Committer: Thomas Gleixner tglx@linutronix.de CommitterDate: Fri, 02 Aug 2024 18:29:28 +02:00

clocksource: Fix brown-bag boolean thinko in cs_watchdog_read()

The current "nretries > 1 || nretries >= max_retries" check in cs_watchdog_read() will always evaluate to true, and thus pr_warn(), if nretries is greater than 1. The intent is instead to never warn on the first try, but otherwise warn if the successful retry was the last retry.

Therefore, change that "||" to "&&".

Fixes: db3a34e17433 ("clocksource: Retry clock read if long delays detected") Reported-by: Borislav Petkov bp@alien8.de Signed-off-by: Paul E. McKenney paulmck@kernel.org Signed-off-by: Thomas Gleixner tglx@linutronix.de Cc: stable@vger.kernel.org Link: https://lore.kernel.org/all/20240802154618.4149953-2-paulmck@kernel.org

--- kernel/time/clocksource.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c index d25ba49..d0538a7 100644 --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c @@ -246,7 +246,7 @@ static enum wd_read_status cs_watchdog_read(struct clocksource *cs, u64 *csnow,

wd_delay = cycles_to_nsec_safe(watchdog, *wdnow, wd_end); if (wd_delay <= WATCHDOG_MAX_SKEW) { - if (nretries > 1 || nretries >= max_retries) { + if (nretries > 1 && nretries >= max_retries) { pr_warn("timekeeping watchdog on CPU%d: %s retried %d times before success\n", smp_processor_id(), watchdog->name, nretries); }