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| author | Badhri Jagan Sridharan <badhri@google.com> | 2022-08-18 00:54:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-08 13:28:06 +0300 |
| commit | ea72b22a05ea546ded582edfdbb2aa29993b1e72 (patch) | |
| tree | f98a8643fe8c2a991b4aa16d0e58a0550ce1e4c4 | |
| parent | 4be500c63911a94722abc5b7cb65cb103acbdb12 (diff) | |
| download | linux-ea72b22a05ea546ded582edfdbb2aa29993b1e72.tar.xz | |
usb: typec: tcpm: Return ENOTSUPP for power supply prop writes
commit f2d38edc5e3375e56b4a30d5b66cefd385a2b38c upstream.
When the port does not support USB PD, prevent transition to PD
only states when power supply property is written. In this case,
TCPM transitions to SNK_NEGOTIATE_CAPABILITIES
which should not be the case given that the port is not pd_capable.
[ 84.308251] state change SNK_READY -> SNK_NEGOTIATE_CAPABILITIES [rev3 NONE_AMS]
[ 84.308335] Setting usb_comm capable false
[ 84.323367] set_auto_vbus_discharge_threshold mode:3 pps_active:n vbus:5000 ret:0
[ 84.323376] state change SNK_NEGOTIATE_CAPABILITIES -> SNK_WAIT_CAPABILITIES [rev3 NONE_AMS]
Fixes: e9e6e164ed8f6 ("usb: typec: tcpm: Support non-PD mode")
Cc: stable@vger.kernel.org
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Link: https://lore.kernel.org/r/20220817215410.1807477-1-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/typec/tcpm/tcpm.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c index 5fce795b69c7..33aadc0a29ea 100644 --- a/drivers/usb/typec/tcpm/tcpm.c +++ b/drivers/usb/typec/tcpm/tcpm.c @@ -6213,6 +6213,13 @@ static int tcpm_psy_set_prop(struct power_supply *psy, struct tcpm_port *port = power_supply_get_drvdata(psy); int ret; + /* + * All the properties below are related to USB PD. The check needs to be + * property specific when a non-pd related property is added. + */ + if (!port->pd_supported) + return -EOPNOTSUPP; + switch (psp) { case POWER_SUPPLY_PROP_ONLINE: ret = tcpm_psy_set_online(port, val); |