[PATCH v2 0/8] HID: iio: Avoid race between callback setup and device exposure

[Sanjay Chitroda]

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@xxxxxxxxx

To: Jiri Kosina <jikos@xxxxxxxxxx>
To: Jonathan Cameron <jic23@xxxxxxxxxx>
To: Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>
To: David Lechner <dlechner@xxxxxxxxxxxx>
To: Nuno Sá <nuno.sa@xxxxxxxxxx>
To: Andy Shevchenko <andy@xxxxxxxxxx>
Cc: linux-input@xxxxxxxxxxxxxxx
Cc: linux-iio@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx

---
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 <sanjayembeddedse@xxxxxxxxx>