usb: typec: tcpci: mask event interrupts when remove driver

This is to prevent any possible events generated while unregister
tpcm port.

Fixes: 74e656d6b055 ("staging: typec: Type-C Port Controller Interface driver (tcpci)")
Signed-off-by: Li Jun <jun.li@nxp.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/1579502333-4145-1-git-send-email-jun.li@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c
index 8b4ff9fff340c9a3a4f06c33a6446dfb778c6a53..753645bb25273a9babb9d4c97a13ecb67554798f 100644 (file)
--- a/drivers/usb/typec/tcpm/tcpci.c
+++ b/drivers/usb/typec/tcpm/tcpci.c
@@ -591,6 +591,12 @@ static int tcpci_probe(struct i2c_client *client,
 static int tcpci_remove(struct i2c_client *client)
 {
        struct tcpci_chip *chip = i2c_get_clientdata(client);
+       int err;
+
+       /* Disable chip interrupts before unregistering port */
+       err = tcpci_write16(chip->tcpci, TCPC_ALERT_MASK, 0);
+       if (err < 0)
+               return err;
 
        tcpci_unregister_port(chip->tcpci);