CVE-2026-31687

In the Linux kernel, the following vulnerability has been resolved:

gpio: omap: do not register driver in probe()

Commit 11a78b794496 ("ARM: OMAP: MPUIO wake updates") registers the omapmpuiodriver from omapmpuioinit(), which is called from omapgpioprobe().

However, it neither makes sense to register drivers from probe() callbacks of other drivers, nor does the driver core allow registering drivers with a device lock already being held.

The latter was revealed by commit dc23806a7c47 ("driver core: enforce devicelock for drivermatch_device()") leading to a potential deadlock condition described in [1].

Additionally, the omapmpuiodriver is never unregistered from the driver core, even if the module is unloaded.

Hence, register the omapmpuiodriver from the module initcall and unregister it in module_exit().