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authorJonathan Lemon <jonathan.lemon@gmail.com>2022-05-14 01:52:31 +0300
committerJakub Kicinski <kuba@kernel.org>2022-05-16 23:07:46 +0300
commitda2172a9bfec858ceeb0271b9d444378490398c8 (patch)
tree418bb6e59adf98dc47abb9b67452e2167cb5cb43 /drivers/ptp/ptp_ocp.c
parent4d42d54a7d6aa6d29221d3fd4f2ae9503e94f011 (diff)
downloadlinux-da2172a9bfec858ceeb0271b9d444378490398c8.tar.xz
ptp: ocp: have adjtime handle negative delta_ns correctly
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: 90f8f4c0e3ce ("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>
Diffstat (limited to 'drivers/ptp/ptp_ocp.c')
-rw-r--r--drivers/ptp/ptp_ocp.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/ptp/ptp_ocp.c b/drivers/ptp/ptp_ocp.c
index dd45471f6780..36c0e188216b 100644
--- a/drivers/ptp/ptp_ocp.c
+++ b/drivers/ptp/ptp_ocp.c
@@ -841,7 +841,7 @@ __ptp_ocp_adjtime_locked(struct ptp_ocp *bp, u32 adj_val)
}
static void
-ptp_ocp_adjtime_coarse(struct ptp_ocp *bp, u64 delta_ns)
+ptp_ocp_adjtime_coarse(struct ptp_ocp *bp, s64 delta_ns)
{
struct timespec64 ts;
unsigned long flags;
@@ -850,7 +850,8 @@ ptp_ocp_adjtime_coarse(struct ptp_ocp *bp, u64 delta_ns)
spin_lock_irqsave(&bp->lock, flags);
err = __ptp_ocp_gettime_locked(bp, &ts, NULL);
if (likely(!err)) {
- timespec64_add_ns(&ts, delta_ns);
+ set_normalized_timespec64(&ts, ts.tv_sec,
+ ts.tv_nsec + delta_ns);
__ptp_ocp_settime_locked(bp, &ts);
}
spin_unlock_irqrestore(&bp->lock, flags);