pwm: Ensure that pwm_chips are allocated using pwmchip_alloc()

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Memory holding a struct device must not be freed before the reference
count drops to zero. So a struct pwm_chip must not live in memory
freed by a driver on unbind. All in-tree drivers were fixed accordingly,
but as out-of-tree drivers, that were not adapted, still compile fine,
catch these in pwmchip_add().

Link: https://lore.kernel.org/r/35f5b229c98f78b2f6ce2397259a4a936be477c0.1707900770.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

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Uwe Kleine-König 2024-02-14 10:33:28 +01:00

parent 79dedfadb7

commit 05947224ff

2 changed files with 12 additions and 0 deletions

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10

drivers/pwm/core.c

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2

include/linux/pwm.h

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