[PATCH 0/5] extcon: cancel wq_detcable delayed work on driver unbind

[Tristan Madani <tristmd@gmail.com>]

From: Tristan Madani <tristan@talencesecurity.com>

Several extcon MUIC drivers schedule a delayed work (wq_detcable) during
probe for post-boot cable state detection, but never cancel it on driver
unbind.  If the device is removed before the work fires, the callback
dereferences freed memory.

Use devm_delayed_work_autocancel() to tie the work lifecycle to the
device.  This matches the pattern already used by extcon-gpio,
extcon-palmas, extcon-qcom-spmi-misc, and extcon-intel-int3496.

For the Maxim drivers (max14577, max77693, max8997), irq_work was
already converted to devm_work_autocancel() but wq_detcable was missed.
The rt8973a and sm5502 drivers also need the devm-helpers.h include.

Tristan Madani (5):
  extcon: max14577: cancel wq_detcable on driver unbind
  extcon: max77693: cancel wq_detcable on driver unbind
  extcon: max8997: cancel wq_detcable on driver unbind
  extcon: rt8973a: cancel wq_detcable on driver unbind
  extcon: sm5502: cancel wq_detcable on driver unbind

 drivers/extcon/extcon-max14577.c | 5 ++++-
 drivers/extcon/extcon-max77693.c | 5 ++++-
 drivers/extcon/extcon-max8997.c  | 5 ++++-
 drivers/extcon/extcon-rt8973a.c  | 6 +++++-
 drivers/extcon/extcon-sm5502.c   | 6 +++++-
 5 files changed, 22 insertions(+), 5 deletions(-)

-- 
2.47.3