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AJvYcCViX37Pao+m0Oql70FWhY4ijv1+kaeJyKuQ9D64bpx+3nQ1qkqKuYXcdlWo5W+f84Oi25r7SCHYNW/H/4w=@vger.kernel.org X-Gm-Message-State: AOJu0Yw49+JsaVbthODCC0qKynMSBoJxrKEPWTZB1pnFKMm8ZYRxJ2bM uq5rhxneUi4UlZwaFyX7Ina8rsd7xB8Xw2MmoIB5Fuis+n/a2jTSm4HwgCK4AmljaOwUm7gmA2t gqLMaUg== X-Google-Smtp-Source: AGHT+IGkr8UAfp8910PuFH8e/qEzAisukJhG++h2a5IVreybtqueuR45Jc5ifmR2fC/4KhF1YX6HdXl7BV8= X-Received: from pjbsn4.prod.google.com ([2002:a17:90b:2e84:b0:330:88c4:627]) (user=khtsai job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:38cc:b0:32e:73fd:81a3 with SMTP id 98e67ed59e1d1-33b513eb0femr29690215a91.33.1760320903029; Sun, 12 Oct 2025 19:01:43 -0700 (PDT) Date: Mon, 13 Oct 2025 10:01:22 +0800 In-Reply-To: <20251013-usbcore-tracing-v1-0-b885a3121b09@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251013-usbcore-tracing-v1-0-b885a3121b09@google.com> X-Developer-Key: i=khtsai@google.com; a=ed25519; pk=abA4Pw6dY2ZufSbSXW9mtp7xiv1AVPtgRhCFWJSEqLE= X-Developer-Signature: v=1; a=ed25519-sha256; t=1760320897; l=2427; i=khtsai@google.com; s=20250916; h=from:subject:message-id; bh=W1ZqjHMGkcPhS96Nn90N/uD9fXd06oRK0TD8pV2UjtE=; b=YbB7vEuy7St/zF23D/kZ6foaQL+87G2fS0eKhALJBnNRa8Wn1LTjy6hJZ9kK3q0YgkIvEuY2d O+dRkkL4FcVAH90lo9fEVWYOOj/Fl6KvUMnum8BnZfjHFLLfFKaLeQt X-Mailer: b4 0.14.2 Message-ID: <20251013-usbcore-tracing-v1-1-b885a3121b09@google.com> Subject: [PATCH 1/2] usb: core: Centralize device state update logic From: Kuen-Han Tsai To: Greg Kroah-Hartman , Mathias Nyman , Alan Stern Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Kuen-Han Tsai Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Introduce a new static inline function, update_usb_device_state(), to centralize the process of changing a device's state, including the management of active_duration during suspend/resume transitions. This change prepares for adding tracepoints, allowing tracing logic to be added in a single, central location within the new helper function. Signed-off-by: Kuen-Han Tsai --- drivers/usb/core/hub.c | 28 ++++++++++++++++------------ 1 file changed, 16 insertions(+), 12 deletions(-) diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 256fe8c86828d51c33442345acdb7f3fe80a98ce..ce3d94c960470e9be7979b10215= 51eab5fd03517 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -2147,6 +2147,20 @@ static void update_port_device_state(struct usb_devi= ce *udev) } } =20 +static inline void update_usb_device_state(struct usb_device *udev, + enum usb_device_state new_state) +{ + if (udev->state =3D=3D USB_STATE_SUSPENDED && + new_state !=3D USB_STATE_SUSPENDED) + udev->active_duration -=3D jiffies; + else if (new_state =3D=3D USB_STATE_SUSPENDED && + udev->state !=3D USB_STATE_SUSPENDED) + udev->active_duration +=3D jiffies; + + udev->state =3D new_state; + update_port_device_state(udev); +} + static void recursively_mark_NOTATTACHED(struct usb_device *udev) { struct usb_hub *hub =3D usb_hub_to_struct_hub(udev); @@ -2156,10 +2170,7 @@ static void recursively_mark_NOTATTACHED(struct usb_= device *udev) if (hub->ports[i]->child) recursively_mark_NOTATTACHED(hub->ports[i]->child); } - if (udev->state =3D=3D USB_STATE_SUSPENDED) - udev->active_duration -=3D jiffies; - udev->state =3D USB_STATE_NOTATTACHED; - update_port_device_state(udev); + update_usb_device_state(udev, USB_STATE_NOTATTACHED); } =20 /** @@ -2209,14 +2220,7 @@ void usb_set_device_state(struct usb_device *udev, else wakeup =3D 0; } - if (udev->state =3D=3D USB_STATE_SUSPENDED && - new_state !=3D USB_STATE_SUSPENDED) - udev->active_duration -=3D jiffies; - else if (new_state =3D=3D USB_STATE_SUSPENDED && - udev->state !=3D USB_STATE_SUSPENDED) - udev->active_duration +=3D jiffies; - udev->state =3D new_state; - update_port_device_state(udev); + update_usb_device_state(udev, new_state); } else recursively_mark_NOTATTACHED(udev); spin_unlock_irqrestore(&device_state_lock, flags); --=20 2.51.0.740.g6adb054d12-goog