linux-kernel - [PATCH] platform/chrome: cros_ec_typec: Check for device within remove function

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 18 Mar 2021 18:51:03 -0700
From:   Prashant Malani <pmalani@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     Prashant Malani <pmalani@...omium.org>,
        Benson Leung <bleung@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Guenter Roeck <groeck@...omium.org>
Subject: [PATCH] platform/chrome: cros_ec_typec: Check for device within remove function

In a couple of call sites, we use the same pattern of checking for a
partner or cable device before attempting to remove it. Simplify this by
moving those checks into the remove functions.

Cc: Benson Leung <bleung@...omium.org>
Signed-off-by: Prashant Malani <pmalani@...omium.org>
---
 drivers/platform/chrome/cros_ec_typec.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
index 0811562deecc..8e7fde3e7032 100644
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -220,6 +220,9 @@ static void cros_typec_remove_partner(struct cros_typec_data *typec,
 {
 	struct cros_typec_port *port = typec->ports[port_num];
 
+	if (!port->partner)
+		return;
+
 	cros_typec_unregister_altmodes(typec, port_num, true);
 
 	cros_typec_usb_disconnect_state(port);
@@ -235,6 +238,9 @@ static void cros_typec_remove_cable(struct cros_typec_data *typec,
 {
 	struct cros_typec_port *port = typec->ports[port_num];
 
+	if (!port->cable)
+		return;
+
 	cros_typec_unregister_altmodes(typec, port_num, false);
 
 	typec_unregister_plug(port->plug);
@@ -253,11 +259,8 @@ static void cros_unregister_ports(struct cros_typec_data *typec)
 		if (!typec->ports[i])
 			continue;
 
-		if (typec->ports[i]->partner)
-			cros_typec_remove_partner(typec, i);
-
-		if (typec->ports[i]->cable)
-			cros_typec_remove_cable(typec, i);
+		cros_typec_remove_partner(typec, i);
+		cros_typec_remove_cable(typec, i);
 
 		usb_role_switch_put(typec->ports[i]->role_sw);
 		typec_switch_put(typec->ports[i]->ori_sw);
@@ -647,11 +650,8 @@ static void cros_typec_set_port_params_v1(struct cros_typec_data *typec,
 				 "Failed to register partner on port: %d\n",
 				 port_num);
 	} else {
-		if (typec->ports[port_num]->partner)
-			cros_typec_remove_partner(typec, port_num);
-
-		if (typec->ports[port_num]->cable)
-			cros_typec_remove_cable(typec, port_num);
+		cros_typec_remove_partner(typec, port_num);
+		cros_typec_remove_cable(typec, port_num);
 	}
 }
 
-- 
2.31.0.rc2.261.g7f71774620-goog