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[34.125.111.132]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-227811c1b8fsm23330555ad.154.2025.03.21.16.19.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 Mar 2025 16:19:05 -0700 (PDT) Date: Fri, 21 Mar 2025 23:19:01 +0000 From: Benson Leung To: Andrei Kuchynski Cc: Heikki Krogerus , Greg Kroah-Hartman , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Benson Leung , Jameson Thies , stable@vger.kernel.org Subject: Re: [PATCH 2/2] usb: typec: class: Invalidate USB device pointers on partner unregistration Message-ID: References: <20250321143728.4092417-1-akuchynski@chromium.org> <20250321143728.4092417-3-akuchynski@chromium.org> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="cN3cAe1kDpvEvgtB" Content-Disposition: inline In-Reply-To: <20250321143728.4092417-3-akuchynski@chromium.org> --cN3cAe1kDpvEvgtB Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Andrei, On Fri, Mar 21, 2025 at 02:37:27PM +0000, Andrei Kuchynski wrote: > 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. >=20 > 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 > --- > drivers/usb/typec/class.c | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) >=20 > 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_partne= r *partner) > port =3D to_typec_port(partner->dev.parent); > =20 > 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 =3D NULL; > + } > + if (port->usb3_dev) { > typec_partner_unlink_device(partner, port->usb3_dev); > + port->usb3_dev =3D NULL; > + } > =20 > device_unregister(&partner->dev); > mutex_unlock(&port->partner_link_lock); > --=20 > 2.49.0.395.g12beb8f557-goog >=20 --cN3cAe1kDpvEvgtB Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQQCtZK6p/AktxXfkOlzbaomhzOwwgUCZ93z5QAKCRBzbaomhzOw wuFRAP4tlk6s6adpSCRvWDdtv0FaODRXc1HiADy+70TI9ectMAD/bOW7B2uK9KrQ c+EbKHzy8PaWNAxKs4biseORVjHi6gU= =CBy0 -----END PGP SIGNATURE----- --cN3cAe1kDpvEvgtB--