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[34.91.20.140]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ac3ef8d3d43sm165303566b.51.2025.03.21.07.38.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 Mar 2025 07:38:33 -0700 (PDT) From: Andrei Kuchynski To: Heikki Krogerus , Greg Kroah-Hartman , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Benson Leung , Jameson Thies , Andrei Kuchynski , stable@vger.kernel.org Subject: [PATCH 2/2] usb: typec: class: Invalidate USB device pointers on partner unregistration Date: Fri, 21 Mar 2025 14:37:27 +0000 Message-ID: <20250321143728.4092417-3-akuchynski@chromium.org> X-Mailer: git-send-email 2.49.0.395.g12beb8f557-goog In-Reply-To: <20250321143728.4092417-1-akuchynski@chromium.org> References: <20250321143728.4092417-1-akuchynski@chromium.org> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 To avoid using invalid USB device pointers after a Type-C partner disconnects, this patch clears the pointers upon partner unregistration. This ensures a clean state for future connections. Cc: stable@vger.kernel.org Fixes: 59de2a56d127 ("usb: typec: Link enumerated USB devices with Type-C partner") Signed-off-by: Andrei Kuchynski Reviewed-by: Benson Leung Reviewed-by: Heikki Krogerus --- drivers/usb/typec/class.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c index eadb150223f8..3df3e3736916 100644 --- a/drivers/usb/typec/class.c +++ b/drivers/usb/typec/class.c @@ -1086,10 +1086,14 @@ void typec_unregister_partner(struct typec_partner *partner) port = to_typec_port(partner->dev.parent); mutex_lock(&port->partner_link_lock); - if (port->usb2_dev) + if (port->usb2_dev) { typec_partner_unlink_device(partner, port->usb2_dev); - if (port->usb3_dev) + port->usb2_dev = NULL; + } + if (port->usb3_dev) { typec_partner_unlink_device(partner, port->usb3_dev); + port->usb3_dev = NULL; + } device_unregister(&partner->dev); mutex_unlock(&port->partner_link_lock);