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usb: typec: class: Invalidate USB device pointers on partner unregistration

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commit 66e1a887273c6b89f09bc11a40d0a71d5a081a8e upstream.

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: 59de2a56d1 ("usb: typec: Link enumerated USB devices with Type-C partner")
Signed-off-by: Andrei Kuchynski <akuchynski@chromium.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Benson Leung <bleung@chromium.org>
Link: https://lore.kernel.org/r/20250321143728.4092417-3-akuchynski@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andrei Kuchynski
2025-03-21 14:37:27 +00:00
committed by Greg Kroah-Hartman
parent 45314999f9
commit 40966fc993
1 changed files with 6 additions and 2 deletions
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8
drivers/usb/typec/class.c
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@@ -966,10 +966,14 @@ 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);