Re: [PATCH v3] iio: pressure: rohm-bm1390: harden trigger handler against transient errors

[Matti Vaittinen <mazziesaccount@gmail.com>]

On 18/05/2026 21:11, Stepan Ionichev wrote:
> bm1390_trigger_handler() returns from three error paths without calling
> iio_trigger_notify_done(). The success path at the end does, so on a
> transient regmap or read failure the trigger's use_count is never
> decremented and iio_trigger_poll_chained() drops subsequent dispatches
> until the trigger is reattached.
> 
> This is not a fix for a reported bug, only hardening against hardware
> or bus glitches; if a glitch is persistent the device is wedged and
> needs an unbind anyway, which is left to the user.
> 
> Split the function so the inner helper returns bool with the data-read
> outcome, and the outer IRQ handler calls iio_trigger_notify_done()
> once and reports the result via IRQ_RETVAL().
> 
> Signed-off-by: Stepan Ionichev <sozdayvek@gmail.com>

Reviewed-by: Matti Vaittinen <mazziesaccount@gmail.com>

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Matti Vaittinen
Linux kernel developer at ROHM Semiconductors
Oulu Finland

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