Re: [PATCH v2 0/8] HID: iio: Avoid race between callback setup and device exposure
From: Pandruvada, Srinivas <hidden>
Date: 2026-06-22 15:36:05
Also in:
linux-iio, lkml
On Mon, 2026-06-22 at 10:59 +0530, Sanjay Chitroda wrote:
Hi all, This series avoid a race condition in HID IIO drivers related to the ordering between callback registration and device exposure. Currently, several HID IIO drivers register the IIO device (making it visible to userspace and other kernel consumers) before all required callbacks and resources are fully initialized, or rely on devm-based cleanup in a way that does not guarantee correct teardown ordering. This creates a window where the device can be accessed while it is not fully initialized or is being torn down, potentially leading to sample drop or stale/no data. To handle this, the series ensures that: - All required callbacks and resources are set up before the device is registered with the IIO core - Resource cleanup is performed explicitly where ordering matters PS: This is prepratory series to convert all HID IIO driver to devm. Testing: - Compiled with W=1 for each patch in series --- Changes in v2: - Drop fixes tag and rectify commit message with reference to that - Link to v1: https://patch.msgid.link/20260606-5-june-hid-iio-race-fixes-v1-0-27a848c5758f@gmail.com
To: Jiri Kosina <jikos@kernel.org> To: Jonathan Cameron <jic23@kernel.org> To: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> To: David Lechner <dlechner@baylibre.com> To: Nuno Sá <nuno.sa@analog.com> To: Andy Shevchenko <andy@kernel.org> Cc: linux-input@vger.kernel.org Cc: linux-iio@vger.kernel.org Cc: linux-kernel@vger.kernel.org
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
--- Sanjay Chitroda (8): iio: orientation: hid-sensor-rotation: Avoid race between callback setup and device exposure iio: orientation: hid-sensor-incl-3d: Avoid race between callback setup and device exposure iio: gyro: hid-sensor-gyro-3d: Avoid race between callback setup and device exposure iio: pressure: hid-sensor-press: Avoid race between callback setup and device exposure iio: light: hid-sensor-prox: Avoid race between callback setup and device exposure iio: light: hid-sensor-als: Avoid race between callback setup and device exposure iio: magnetometer: hid-sensor-magn-3d: Avoid race between callback setup and device exposure iio: accel: hid-sensor-accel-3d: Avoid race between callback setup and device exposure drivers/iio/accel/hid-sensor-accel-3d.c | 20 ++++++++++------- --- drivers/iio/gyro/hid-sensor-gyro-3d.c | 20 ++++++++++------- --- drivers/iio/light/hid-sensor-als.c | 20 ++++++++++------- --- drivers/iio/light/hid-sensor-prox.c | 20 ++++++++++------- --- drivers/iio/magnetometer/hid-sensor-magn-3d.c | 20 ++++++++++------- --- drivers/iio/orientation/hid-sensor-incl-3d.c | 20 ++++++++++------- --- drivers/iio/orientation/hid-sensor-rotation.c | 20 ++++++++++------- --- drivers/iio/pressure/hid-sensor-press.c | 20 ++++++++++------- --- 8 files changed, 80 insertions(+), 80 deletions(-) --- base-commit: cc746297b23e89bd5df9f91f3a0ca209e8991763 change-id: 20260605-5-june-hid-iio-race-fixes-f8b981f82b80 Best regards, -- Sanjay Chitroda [off-list ref]