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authorVladimir Oltean <vladimir.oltean@nxp.com>2021-10-12 14:40:37 +0300
committerJakub Kicinski <kuba@kernel.org>2021-10-12 17:35:18 -0700
commit9fde506e0c53b8309f69b18b4b8144c544b4b3b1 (patch)
tree04b1cb70db9b713c7ad4b26c93eb257aa25779a6 /drivers
parent52849bcf0029ccc553be304e4f804938a39112e2 (diff)
downloadlinux-9fde506e0c53b8309f69b18b4b8144c544b4b3b1.tar.gz
net: mscc: ocelot: warn when a PTP IRQ is raised for an unknown skb
When skb_match is NULL, it means we received a PTP IRQ for a timestamp ID that the kernel has no idea about, since there is no skb in the timestamping queue with that timestamp ID. This is a grave error and not something to just "continue" over. So print a big warning in case this happens. Also, move the check above ocelot_get_hwtimestamp(), there is no point in reading the full 64-bit current PTP time if we're not going to do anything with it anyway for this skb. Fixes: 4e3b0468e6d7 ("net: mscc: PTP Hardware Clock (PHC) support") Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/mscc/ocelot.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index 9c62f1d13adc..687c07c338cd 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -747,12 +747,12 @@ void ocelot_get_txtstamp(struct ocelot *ocelot)
spin_unlock_irqrestore(&port->tx_skbs.lock, flags);
+ if (WARN_ON(!skb_match))
+ continue;
+
/* Get the h/w timestamp */
ocelot_get_hwtimestamp(ocelot, &ts);
- if (unlikely(!skb_match))
- continue;
-
/* Set the timestamp into the skb */
memset(&shhwtstamps, 0, sizeof(shhwtstamps));
shhwtstamps.hwtstamp = ktime_set(ts.tv_sec, ts.tv_nsec);