linux-kernel - [PATCH v1] usb: typec: tcpm: Clear send_discover in tcpm_check_send

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Message-Id: <20201203031908.1491542-1-badhri@google.com>
Date:   Wed,  2 Dec 2020 19:19:08 -0800
From:   Badhri Jagan Sridharan <badhri@...gle.com>
To:     Guenter Roeck <linux@...ck-us.net>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Badhri Jagan Sridharan <badhri@...gle.com>
Subject: [PATCH v1] usb: typec: tcpm: Clear send_discover in tcpm_check_send_discover

tcpm_check_send_discover does not clear the send_discover flag
when any of the following conditions are not met.
1. data_role is TYPEC_HOST
2. link is pd_capable

Discovery indentity would anyways not be attempted during
the current session anymore when the above conditions are not
met. Hence clear the send_discover flag here to prevent
tcpm_enable_frs_work from rescheduling indefinetly.

Signed-off-by: Badhri Jagan Sridharan <badhri@...gle.com>
---
 drivers/usb/typec/tcpm/tcpm.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 3bbc1f10af49..012135ade7b1 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -3035,10 +3035,9 @@ static inline enum tcpm_state unattached_state(struct tcpm_port *port)
 static void tcpm_check_send_discover(struct tcpm_port *port)
 {
 	if (port->data_role == TYPEC_HOST && port->send_discover &&
-	    port->pd_capable) {
+	    port->pd_capable)
 		tcpm_send_vdm(port, USB_SID_PD, CMD_DISCOVER_IDENT, NULL, 0);
-		port->send_discover = false;
-	}
+	port->send_discover = false;
 }
 
 static void tcpm_swap_complete(struct tcpm_port *port, int result)
-- 
2.29.2.576.ga3fc446d84-goog