[PATCH iwl-net 8/10] ice: set ETS TLV willing bit in default MIB sent to firmware

[Aleksandr Loktionov <aleksandr.loktionov@intel.com>]

When the FW LLDP agent is active the driver sends an initial
DCB configuration via set_local_mib. Currently the ETS TLV
willing bit is clear, which prevents LLDP negotiation and
renders the FW LLDP mode non-functional.

Add ICE_IEEE_ETS_IS_WILLING to document intent and use it to
set the willing bit so the FW can negotiate DCB settings with
the peer. This only affects the default configuration; SW LLDP
mode overrides it immediately afterwards.

Fixes: 7d9c9b791f9e ("ice: Implement LFC workaround")
Cc: stable@vger.kernel.org
Signed-off-by: Yochai Hagvi <yochai.hagvi@intel.com>
Signed-off-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_dcb.h  | 1 +
 drivers/net/ethernet/intel/ice/ice_main.c | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_dcb.h b/drivers/net/ethernet/intel/ice/ice_dcb.h
index be34650..91d6682 100644
--- a/drivers/net/ethernet/intel/ice/ice_dcb.h
+++ b/drivers/net/ethernet/intel/ice/ice_dcb.h
@@ -52,6 +52,7 @@
 #define ICE_IEEE_ETS_CBS_M		BIT(ICE_IEEE_ETS_CBS_S)
 #define ICE_IEEE_ETS_WILLING_S		7
 #define ICE_IEEE_ETS_WILLING_M		BIT(ICE_IEEE_ETS_WILLING_S)
+#define ICE_IEEE_ETS_IS_WILLING		BIT(ICE_IEEE_ETS_WILLING_S)
 #define ICE_IEEE_ETS_PRIO_0_S		0
 #define ICE_IEEE_ETS_PRIO_0_M		(0x7 << ICE_IEEE_ETS_PRIO_0_S)
 #define ICE_IEEE_ETS_PRIO_1_S		4
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index e7308e3..75a48e5 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -971,7 +971,7 @@ static void ice_set_dflt_mib(struct ice_pf *pf)
 	tlv->ouisubtype = htonl(ouisubtype);
 
 	buf = tlv->tlvinfo;
-	buf[0] = 0;
+	buf[0] = ICE_IEEE_ETS_IS_WILLING;
 
 	/* ETS CFG all UPs map to TC 0. Next 4 (1 - 4) Octets = 0.
 	 * Octets 5 - 12 are BW values, set octet 5 to 100% BW.
-- 
2.52.0