From: Kuen-Han Tsai <khtsai@google.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Mathias Nyman <mathias.nyman@linux.intel.com>,
Alan Stern <stern@rowland.harvard.edu>
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
Kuen-Han Tsai <khtsai@google.com>
Subject: [PATCH v2 0/2] usb: core: Improve device lifecycle debuggability
Date: Wed, 15 Oct 2025 03:50:50 +0800 [thread overview]
Message-ID: <20251015-usbcore-tracing-v2-0-5a14b5b9d4e0@google.com> (raw)
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 <khtsai@google.com>
---
Changes in v2:
- hub.c: Changed the inline function to a standard one.
- Makefile: Moved trace.o to the preceding line.
- trace.h: Changed the speed and state into strings.
- Link to v1: https://lore.kernel.org/r/20251013-usbcore-tracing-v1-0-b885a3121b09@google.com
---
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 | 5 +++-
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(+), 13 deletions(-)
---
base-commit: 5472d60c129f75282d94ae5ad072ee6dfb7c7246
change-id: 20251012-usbcore-tracing-76f00c9b2b3e
Best regards,
--
Kuen-Han Tsai <khtsai@google.com>
next reply other threads:[~2025-10-14 19:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-14 19:50 Kuen-Han Tsai [this message]
2025-10-14 19:50 ` [PATCH v2 1/2] usb: core: Centralize device state update logic Kuen-Han Tsai
2025-10-14 19:50 ` [PATCH v2 2/2] usb: core: Add tracepoints for device allocation and state changes Kuen-Han Tsai
2025-10-14 20:53 ` [PATCH v2 0/2] usb: core: Improve device lifecycle debuggability Alan Stern
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