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request_threaded_irq with device_id, so free_irq should "release" it, otherwise rmmod would panic.
Summary by Bito
This pull request fixes a critical bug in bh_threaded.c by ensuring the free_irq function properly releases IRQs for buttons, preventing system panic during module removal and enhancing overall system stability. This enhancement is vital for maintaining overall system stability.Unit tests added: False
Estimated effort to review (1-5, lower is better): 2