octeontx2-pf: Reduce minimum mtu size to 60

PTP messages like SYNC, FOLLOW_UP, DELAY_REQ are of size 58 bytes.
Using a minimum packet length as 64 makes NIX to pad 6 bytes of
zeroes while transmission. This is causing latest ptp4l application to
emit errors since length in PTP header and received packet are not same.
Padding upto 3 bytes is fine but more than that makes ptp4l to assume
the pad bytes as a TLV. Hence reduce the size to 60 from 64.

Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: Naveen Mamindlapalli <naveenm@marvell.com>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
Link: https://lore.kernel.org/r/20220729092457.3850-1-naveenm@marvell.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.h b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.h
index c88e8a4360290cdbe62030e393edd82dc81a01aa..fbe62bbfb789afbf875c177ef4835bb42f9efabc 100644 (file)
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.h
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_txrx.h
@@ -21,7 +21,7 @@
 #define OTX2_HEAD_ROOM         OTX2_ALIGN
 
 #define        OTX2_ETH_HLEN           (VLAN_ETH_HLEN + VLAN_HLEN)
-#define        OTX2_MIN_MTU            64
+#define        OTX2_MIN_MTU            60
 
 #define OTX2_MAX_GSO_SEGS      255
 #define OTX2_MAX_FRAGS_IN_SQE  9