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The `pwm::Registration::register` function provides no guarantee that the function isn't called twice with the same pwm chip, which is considered unsafe. Add `pwm::UnregisteredChip` as wrapper around `pwm::Chip`. Implement `pwm::UnregisteredChip::register` for the registration. This function takes ownership of `pwm::UnregisteredChip` and therefore guarantees that the registration can't be called twice on the same pwm chip. Signed-off-by: Markus Probst <markus.probst@posteo.de> Tested-by: Michal Wilczynski <m.wilczynski@samsung.com> Acked-by: Michal Wilczynski <m.wilczynski@samsung.com> Link: https://patch.msgid.link/20251202-pwm_safe_register-v2-1-7a2e0d1e287f@posteo.de [ukleinek: fixes a typo that Michal pointed out during review] Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org> |
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