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ptp: ocp: have adjtime handle negative delta_ns correctly
[ Upstream commitda2172a9bf
] delta_ns is a s64, but it was being passed ptp_ocp_adjtime_coarse as an u64. Also, it turns out that timespec64_add_ns() only handles positive values, so perform the math with set_normalized_timespec(). Fixes:90f8f4c0e3
("ptp: ocp: Add ptp_ocp_adjtime_coarse for large adjustments") Suggested-by: Vadim Fedorenko <vfedorenko@novek.ru> Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com> Acked-by: Vadim Fedorenko <vfedorenko@novek.ru> Link: https://lore.kernel.org/r/20220513225231.1412-1-jonathan.lemon@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 3 additions and 2 deletions
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@ -625,7 +625,7 @@ __ptp_ocp_adjtime_locked(struct ptp_ocp *bp, u32 adj_val)
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}
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static void
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ptp_ocp_adjtime_coarse(struct ptp_ocp *bp, u64 delta_ns)
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ptp_ocp_adjtime_coarse(struct ptp_ocp *bp, s64 delta_ns)
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{
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struct timespec64 ts;
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unsigned long flags;
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@ -634,7 +634,8 @@ ptp_ocp_adjtime_coarse(struct ptp_ocp *bp, u64 delta_ns)
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spin_lock_irqsave(&bp->lock, flags);
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err = __ptp_ocp_gettime_locked(bp, &ts, NULL);
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if (likely(!err)) {
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timespec64_add_ns(&ts, delta_ns);
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set_normalized_timespec64(&ts, ts.tv_sec,
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ts.tv_nsec + delta_ns);
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__ptp_ocp_settime_locked(bp, &ts);
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}
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spin_unlock_irqrestore(&bp->lock, flags);
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