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[34.127.75.226]) by smtp.gmail.com with UTF8SMTPSA id d9443c01a7336-20b0e4ed6c2sm7061535ad.271.2024.09.25.09.25.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 25 Sep 2024 09:25:18 -0700 (PDT) From: Abhishek Pandit-Subedi To: heikki.krogerus@linux.intel.com, tzungbi@kernel.org Cc: jthies@google.com, pmalani@chromium.org, akuchynski@google.com, Abhishek Pandit-Subedi , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org Subject: [PATCH 3/8] usb: typec: intel_pmc_mux: Null check before use Date: Wed, 25 Sep 2024 09:25:04 -0700 Message-ID: <20240925092505.3.Ib7a83adb069df1cb0a40dcddff29618bf3255700@changeid> X-Mailer: git-send-email 2.46.0.792.g87dc391469-goog In-Reply-To: <20240925162513.435177-1-abhishekpandit@chromium.org> References: <20240925162513.435177-1-abhishekpandit@chromium.org> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Make sure the data pointer in typec_mux_state is not null before accessing it. Signed-off-by: Abhishek Pandit-Subedi --- drivers/usb/typec/mux/intel_pmc_mux.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c index 56989a0d0f43..4283fead9a69 100644 --- a/drivers/usb/typec/mux/intel_pmc_mux.c +++ b/drivers/usb/typec/mux/intel_pmc_mux.c @@ -331,14 +331,19 @@ static int pmc_usb_mux_tbt(struct pmc_usb_port *port, struct typec_mux_state *state) { struct typec_thunderbolt_data *data = state->data; - u8 cable_rounded = TBT_CABLE_ROUNDED_SUPPORT(data->cable_mode); - u8 cable_speed = TBT_CABLE_SPEED(data->cable_mode); + u8 cable_rounded, cable_speed; struct altmode_req req = { }; + if (!data) + return 0; + if (IOM_PORT_ACTIVITY_IS(port->iom_status, TBT) || IOM_PORT_ACTIVITY_IS(port->iom_status, ALT_MODE_TBT_USB)) return 0; + cable_rounded = TBT_CABLE_ROUNDED_SUPPORT(data->cable_mode); + cable_speed = TBT_CABLE_SPEED(data->cable_mode); + req.usage = PMC_USB_ALT_MODE; req.usage |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT; req.mode_type = PMC_USB_MODE_TYPE_TBT << PMC_USB_MODE_TYPE_SHIFT;