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a=QyXUC8HyAAAA:8 a=ag1SF4gXAAAA:8 a=eDMlovH_pQf_qwTT83MA:9 a=QEXdDO2ut3YA:10 a=FO4_E8m0qiDe52t0p3_H:22 a=Yupwre4RP9_Eg_Bd0iYG:22 a=5yU3S35YU4bGjq-dph-N:22 a=Bho9c0fBagfJEIQBS7DQ:22 cc=ntf awl=host:13839 Hi Greg, On 12/05/26 23:08, Greg Kroah-Hartman wrote: > 6.12-stable review patch. If anyone has any objections, please let me know. > > ------------------ > > From: Amit Sunil Dhamne > > commit 2909f0d4994fb4306bf116df5ccee797791fce2c upstream. > > Reset internal port states (such as vdm_sm_running and > explicit_contract) on soft reset AMS as the port needs to negotiate a > new contract. The consequence of leaving the states in as-is cond are as > follows: > * port is in SRC power role and an explicit contract is negotiated > with the port partner (in sink role) > * port partner sends a Soft Reset AMS while VDM State Machine is > running > * port accepts the Soft Reset request and the port advertises src caps > * port partner sends a Request message but since the explicit_contract > and vdm_sm_running are true from previous negotiation, the port ends > up sending Soft Reset instead of Accept msg. > > Stub Log: > [ 203.653942] AMS DISCOVER_IDENTITY start > [ 203.653947] PD TX, header: 0x176f > [ 203.655901] PD TX complete, status: 0 > [ 203.657470] PD RX, header: 0x124f [1] > [ 203.657477] Rx VDM cmd 0xff008081 type 2 cmd 1 len 1 > [ 203.657482] AMS DISCOVER_IDENTITY finished > [ 203.657484] cc:=4 > [ 204.155698] PD RX, header: 0x144f [1] > [ 204.155718] Rx VDM cmd 0xeeee8001 type 0 cmd 1 len 1 > [ 204.155741] PD TX, header: 0x196f > [ 204.157622] PD TX complete, status: 0 > [ 204.160060] PD RX, header: 0x4d [1] > [ 204.160066] state change SRC_READY -> SOFT_RESET [rev2 SOFT_RESET_AMS] > [ 204.160076] PD TX, header: 0x163 > [ 204.162486] PD TX complete, status: 0 > [ 204.162832] AMS SOFT_RESET_AMS finished > [ 204.162840] cc:=4 > [ 204.162891] AMS POWER_NEGOTIATION start > [ 204.162896] state change SOFT_RESET -> AMS_START [rev2 POWER_NEGOTIATION] > [ 204.162908] state change AMS_START -> SRC_SEND_CAPABILITIES [rev2 POWER_NEGOTIATION] > [ 204.162913] PD TX, header: 0x1361 > [ 204.165529] PD TX complete, status: 0 > [ 204.165571] pending state change SRC_SEND_CAPABILITIES -> SRC_SEND_CAPABILITIES_TIMEOUT @ 60 ms [rev2 POWER_NEGOTIATION] > [ 204.166996] PD RX, header: 0x1242 [1] > [ 204.167009] state change SRC_SEND_CAPABILITIES -> SRC_SOFT_RESET_WAIT_SNK_TX [rev2 POWER_NEGOTIATION] > [ 204.167019] AMS POWER_NEGOTIATION finished > [ 204.167020] cc:=4 > [ 204.167083] AMS SOFT_RESET_AMS start > [ 204.167086] state change SRC_SOFT_RESET_WAIT_SNK_TX -> SOFT_RESET_SEND [rev2 SOFT_RESET_AMS] > [ 204.167092] PD TX, header: 0x16d > [ 204.168824] PD TX complete, status: 0 > [ 204.168854] pending state change SOFT_RESET_SEND -> HARD_RESET_SEND @ 60 ms [rev2 SOFT_RESET_AMS] > [ 204.171876] PD RX, header: 0x43 [1] > [ 204.171879] AMS SOFT_RESET_AMS finished > > This causes COMMON.PROC.PD.11.2 check failure for > TEST.PD.VDM.SRC.2_Rev2Src test on the PD compliance tester. > > Signed-off-by: Amit Sunil Dhamne > Fixes: 8d3a0578ad1a ("usb: typec: tcpm: Respond Wait if VDM state machine is running") > Fixes: f0690a25a140 ("staging: typec: USB Type-C Port Manager (tcpm)") > Cc: stable > Reviewed-by: Badhri Jagan Sridharan > Acked-by: Heikki Krogerus > Link: https://patch.msgid.link/20260414-fix-soft-reset-v1-1-01d7cb9764e2@google.com > Signed-off-by: Greg Kroah-Hartman > Signed-off-by: Greg Kroah-Hartman > --- > drivers/usb/typec/tcpm/tcpm.c | 2 ++ > 1 file changed, 2 insertions(+) > > --- a/drivers/usb/typec/tcpm/tcpm.c > +++ b/drivers/usb/typec/tcpm/tcpm.c > @@ -5614,6 +5614,8 @@ static void run_state_machine(struct tcp > > case VCONN_SWAP_ACCEPT: > tcpm_pd_send_control(port, PD_CTRL_ACCEPT, TCPC_TX_SOP); > + port->vdm_sm_running = false; > + port->explicit_contract = false; I have run an AI assisted backport review and it spotted an issue: I have taken a look and the issues goes like: Upstream commit adds it here: /* Soft_Reset states */ case SOFT_RESET: port->message_id = 0; port->rx_msgid = -1; /* remove existing capabilities */ tcpm_partner_source_caps_reset(port); tcpm_pd_send_control(port, PD_CTRL_ACCEPT, TCPC_TX_SOP); + port->vdm_sm_running = false; + port->explicit_contract = false; tcpm_ams_finish(port); if (port->pwr_role == TYPEC_SOURCE) { port->upcoming_state = SRC_SEND_CAPABILITIES; tcpm_ams_start(port, POWER_NEGOTIATION); } else { downstream backport adds the reset in other case: case VCONN_SWAP_ACCEPT: tcpm_pd_send_control(port, PD_CTRL_ACCEPT, TCPC_TX_SOP); + port->vdm_sm_running = false; + port->explicit_contract = false; tcpm_ams_finish(port); tcpm_set_state(port, VCONN_SWAP_START, 0); break; I think we need to rework on this backport, so I think for the time being we should drop this backport. Thanks, Harshit > tcpm_ams_finish(port); > tcpm_set_state(port, VCONN_SWAP_START, 0); > break; > > >