iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes

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The IIO core does not filter duplicate writes to the event enable
attribute, so writing the same value twice invokes
write_event_config() twice. Enabling twice leaks a runtime PM
reference, preventing the device from ever suspending again;
disabling twice underflows the usage count and triggers a
"Runtime PM usage count underflow" warning.

Bail out early when the requested state matches the current state.
While at it, switch to pm_runtime_resume_and_get() so a failed
resume is propagated to userspace instead of silently marking the
event enabled.

Fixes: 97d642e230 ("iio: light: Add a driver for Sharp GP2AP002x00F")
Signed-off-by: Nikhil Gautam <nikhilgtr@gmail.com>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>

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Nikhil Gautam 2026-07-22 21:52:45 +05:30 • committed by Jonathan Cameron

parent d378fceaaf

commit 579c049b4c

1 changed files with 10 additions and 3 deletions

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drivers/iio/light/gp2ap002.c

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