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authorKurt Kanzenbach <kurt@linutronix.de>2021-08-25 15:58:13 +0200
committerDavid S. Miller <davem@davemloft.net>2021-08-26 10:26:06 +0100
commitb7658ed35a5f5900f0f658e375f366513f3eb781 (patch)
treed98deb58c1ac2c755165b8348eb0af614a43dd09
parenta7db5ed8632c88c029254d5d74765d52614af3fd (diff)
net: dsa: hellcreek: Adjust schedule look ahead window
Traffic schedules can only be started up to eight seconds within the future. Therefore, the driver periodically checks every two seconds whether the admin base time provided by the user is inside that window. If so the schedule is started. Otherwise the check is deferred. However, according to the programming manual the look ahead window size should be four - not eight - seconds. By using the proposed value of four seconds starting a schedule at a specified admin base time actually works as expected. Fixes: 24dfc6eb39b2 ("net: dsa: hellcreek: Add TAPRIO offloading support") Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/dsa/hirschmann/hellcreek.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/dsa/hirschmann/hellcreek.c b/drivers/net/dsa/hirschmann/hellcreek.c
index b57aea92684b..7062db6a083c 100644
--- a/drivers/net/dsa/hirschmann/hellcreek.c
+++ b/drivers/net/dsa/hirschmann/hellcreek.c
@@ -1550,7 +1550,7 @@ static bool hellcreek_schedule_startable(struct hellcreek *hellcreek, int port)
/* Calculate difference to admin base time */
base_time_ns = ktime_to_ns(hellcreek_port->current_schedule->base_time);
- return base_time_ns - current_ns < (s64)8 * NSEC_PER_SEC;
+ return base_time_ns - current_ns < (s64)4 * NSEC_PER_SEC;
}
static void hellcreek_start_schedule(struct hellcreek *hellcreek, int port)