From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A86741CA84 for ; Mon, 13 Oct 2025 02:01:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760320902; cv=none; b=JCdMZLx1o+CdbjBxblH95o7nZJgE9Dif2vQmfxxthbQUwVMFcESspOdg087se6xg6OBqbACq3n/NpLfOqbWPz8z5fgnxJYMNG+cx8fe42NTlgZeQdU51M6QxkwqMOl5poMMsybLRgsLMkLIPoN7TgT7D3s6uIoVTqqbRf6ZtvfE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760320902; c=relaxed/simple; bh=6rOl5TirSFV9ovbqlSzIwyNT5PV/3iS1uNoq79WE41U=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=XT2NgxIjcFviT65g8hmxusP6CY56c2X98FQ2FPbkdSryuDvSsngu1ceNFtxN2nVe0uV3+Dy6bRak1Ujozi4FmIhTeiHvtJIgRYEZGX6cNDNZhTaDahaQLAaiZVLliepnKO48dMdD9Vx8xRReRNcT8l3zC4H8NzJp2XxubCtOKo4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--khtsai.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=dBQyeU6e; arc=none smtp.client-ip=209.85.216.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--khtsai.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="dBQyeU6e" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-32edda89a37so7699101a91.1 for ; Sun, 12 Oct 2025 19:01:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1760320900; x=1760925700; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=JpvLI5nP+gyknn6opMKaUZOwwLDmtrVHeM32uuY4r+Q=; b=dBQyeU6e3UWJFCEPxGVx9dwabhw+8B1ynC8dpWZCqoivQkPZZzFM2BAXLa40bBO9Bt tkigoD5Ke5xoyfSarexmMwED6+S9DOX3IWhI8eAkg4SF+dLcQGthDXPeDhL5VVJaKwRg bznvnuhQ1SGyRVW9R8ui+szw3pezECwo7DLsLQm0nCZflEz2DfVfOUqZ3sZJ4C0aOSfr clPxRsmvCHt381euEYHi3MAU7yzp2Fwp3ILutN4g0SOyXCx44eZSCe3hg6xQoNLRlDUs 2+TgDK66ET05vcnAhOvGwdSfBIy+Yq8rjy7pOeWQQp2/iOyB297sQE9T3DGsKQv98NSG N4PA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1760320900; x=1760925700; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=JpvLI5nP+gyknn6opMKaUZOwwLDmtrVHeM32uuY4r+Q=; b=hj9oTKjPqyP3XSPTVAHy7KQnRq0WUACxgtqwGudVYt9wiLC8kxz4EVHBg2M/eqDxD/ riKp6IHVJ8XSQIGMTqJXZrk1deh3HpHzkid+AQByy83wYjip8ueFxDswjpWRzuqbuyav RdP6AywWbPjL6B6AvbbFBbIR6eYiW9q/Z63fAlWY3ctSsTofud4jmMPaAiQcVABJ0OSY UUjzxE6ONYQv0aFkDkzIqEJLoU2g5fA80uEgUmajdjkprHDlHJtt5UZFSHNoKKGewGyx ai+IB+oi0peFMjLJ7FbKGxkVWxIb+risodWrCmXPgzdtXaZfzw/oEf14u+b8GPJtv5H1 NymA== X-Gm-Message-State: AOJu0YxidF+pKVj2FGuOIOra+xg1F7bgv+5UEMRGI7yqoWXKO8qW00TJ fxim1oz+3nPAdu5zpwdKqcPxLtrpCQBlwwtXHcJzb/aQ/AHWYxaBS06Amdv4LAB5vlj9/E1rKRL MBlA6eg== X-Google-Smtp-Source: AGHT+IGSV4Ol9o+z7zxIxvoRhwLVMndDrfeb5+nVBlXaOxuO1evVU3XRexYaQ2WpjeMZq92/z1BnpCgFK+Y= X-Received: from pjtp2.prod.google.com ([2002:a17:90a:c002:b0:330:9870:9f18]) (user=khtsai job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:38ce:b0:32e:5646:d448 with SMTP id 98e67ed59e1d1-33b513b2ab9mr24908105a91.21.1760320899866; Sun, 12 Oct 2025 19:01:39 -0700 (PDT) Date: Mon, 13 Oct 2025 10:01:21 +0800 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAHFd7GgC/x3MQQqAIBBA0avIrBN0oqKuEi3SppqNxlgRhHdPW r7F/y8kEqYEg3pB6ObEMRTYSoHf57CR5qUY0GBjjUV9JeejkD5l9hw23bWrMb536GqCUh1CKz/ /cZxy/gDvV/PPYQAAAA== X-Change-Id: 20251012-usbcore-tracing-76f00c9b2b3e X-Developer-Key: i=khtsai@google.com; a=ed25519; pk=abA4Pw6dY2ZufSbSXW9mtp7xiv1AVPtgRhCFWJSEqLE= X-Developer-Signature: v=1; a=ed25519-sha256; t=1760320897; l=1014; i=khtsai@google.com; s=20250916; h=from:subject:message-id; bh=6rOl5TirSFV9ovbqlSzIwyNT5PV/3iS1uNoq79WE41U=; b=YY+P8OtFoKB5B2qwpSCuEgDKP9NncBkOqOAnvOShle8YqXY/5iIDKpIZAczOupGq+TfovGCgS 26kzOaY1AirBXEN1QaqbgRX2ldF5HWv2umw+vqpZhAIm6PrAfNgz/Hq X-Mailer: b4 0.14.2 Message-ID: <20251013-usbcore-tracing-v1-0-b885a3121b09@google.com> Subject: [PATCH 0/2] usb: core: Improve device lifecycle debuggability 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" This series enhances USB core debuggability. The first patch refactors device state updates into a new update_usb_device_state() helper function, centralizing logic and preparing for tracing. The second patch adds tracepoints for USB device allocation and state changes, providing better visibility into the device lifecycle. Signed-off-by: Kuen-Han Tsai --- Kuen-Han Tsai (2): usb: core: Centralize device state update logic usb: core: Add tracepoints for device allocation and state changes drivers/usb/core/Makefile | 4 ++++ drivers/usb/core/hub.c | 30 +++++++++++++---------- drivers/usb/core/trace.c | 6 +++++ drivers/usb/core/trace.h | 61 +++++++++++++++++++++++++++++++++++++++++++++++ drivers/usb/core/usb.c | 2 ++ 5 files changed, 91 insertions(+), 12 deletions(-) --- base-commit: 5472d60c129f75282d94ae5ad072ee6dfb7c7246 change-id: 20251012-usbcore-tracing-76f00c9b2b3e Best regards, -- Kuen-Han Tsai