When port partner responds "Not supported" to the DiscIdentity command, VDM state machine can remain in NVDM_STATE_ERR_TMOUT and this causes querying sink cap to be skipped indefinitely. Hence check for vdm_sm_running instead of checking for VDM_STATE_DONE.
Fixes: 8dc4bd073663f ("usb: typec: tcpm: Add support for Sink Fast Role SWAP(FRS)") Signed-off-by: Badhri Jagan Sridharan badhri@google.com --- drivers/usb/typec/tcpm/tcpm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 11d0c40bc47d..39e068d60755 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -5219,7 +5219,7 @@ static void tcpm_enable_frs_work(struct kthread_work *work) goto unlock;
/* Send when the state machine is idle */ - if (port->state != SNK_READY || port->vdm_state != VDM_STATE_DONE || port->send_discover) + if (port->state != SNK_READY || port->vdm_sm_running || port->send_discover) goto resched;
port->upcoming_state = GET_SINK_CAP;
On Wed, Mar 17, 2021 at 11:48:05PM -0700, Badhri Jagan Sridharan wrote:
When port partner responds "Not supported" to the DiscIdentity command, VDM state machine can remain in NVDM_STATE_ERR_TMOUT and this causes querying sink cap to be skipped indefinitely. Hence check for vdm_sm_running instead of checking for VDM_STATE_DONE.
Fixes: 8dc4bd073663f ("usb: typec: tcpm: Add support for Sink Fast Role SWAP(FRS)") Signed-off-by: Badhri Jagan Sridharan badhri@google.com
Acked-by: Heikki Krogerus heikki.krogerus@linux.intel.com
drivers/usb/typec/tcpm/tcpm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 11d0c40bc47d..39e068d60755 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -5219,7 +5219,7 @@ static void tcpm_enable_frs_work(struct kthread_work *work) goto unlock; /* Send when the state machine is idle */
- if (port->state != SNK_READY || port->vdm_state != VDM_STATE_DONE || port->send_discover)
- if (port->state != SNK_READY || port->vdm_sm_running || port->send_discover) goto resched;
port->upcoming_state = GET_SINK_CAP; -- 2.31.0.rc2.261.g7f71774620-goog
thanks,
On 3/17/21 11:48 PM, Badhri Jagan Sridharan wrote:
When port partner responds "Not supported" to the DiscIdentity command, VDM state machine can remain in NVDM_STATE_ERR_TMOUT and this causes querying sink cap to be skipped indefinitely. Hence check for vdm_sm_running instead of checking for VDM_STATE_DONE.
Fixes: 8dc4bd073663f ("usb: typec: tcpm: Add support for Sink Fast Role SWAP(FRS)") Signed-off-by: Badhri Jagan Sridharan badhri@google.com
Reviewed-by: Guenter Roeck linux@roeck-us.net
drivers/usb/typec/tcpm/tcpm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 11d0c40bc47d..39e068d60755 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -5219,7 +5219,7 @@ static void tcpm_enable_frs_work(struct kthread_work *work) goto unlock; /* Send when the state machine is idle */
- if (port->state != SNK_READY || port->vdm_state != VDM_STATE_DONE || port->send_discover)
- if (port->state != SNK_READY || port->vdm_sm_running || port->send_discover) goto resched;
port->upcoming_state = GET_SINK_CAP;
linux-stable-mirror@lists.linaro.org
-
Badhri Jagan Sridharan -
Guenter Roeck -
Heikki Krogerus