Hi, Grygorii Strashko <grygorii.strashko@xxxxxx> writes: > On 11/02/2015 06:06 PM, Felipe Balbi wrote: >> >> hi, >> >> Grygorii Strashko <grygorii.strashko@xxxxxx> writes: >>> On 11/02/2015 05:20 PM, Felipe Balbi wrote: >>>> Grygorii Strashko <grygorii.strashko@xxxxxx> writes: >>>> >>>>> On 10/29/2015 03:57 PM, Felipe Balbi wrote: >>>>>> there's no need to call pm_runtime_get_sync() >>>>>> followed by pm_runtime_put(). We should, instead, >>>>>> just call pm_runtime_put_sync() and pm_runtime_disable(). >>>>> >>>>> Sry, but why do we need to call pm_runtime_put[_sync]() here? >>>>> >>>>> My be just pm_runtime_disable() will be ok? >>>> >>>> and disable with unbalanced pm_runtime_get() ? >>>> >>> >>> Which one is unbalanced pm_runtime_get()? >>> There are no pm_runtime_get() in probe, so there you are >>> going to introduce unbalanced pm_runtime_put_sync() actually :( >> >> look at ti_qspi_setup(). I _do_ see, however, that it calls >> pm_runtime_put_autosuspend() in the same function; what happens if >> driver is removed after ti_qspi_setup() runs but before >> put_autosuspend() has time to actually run ? >> > > Seems nothing :) If I understand code in __device_release_driver() > right: the .remove() callback will be called after > pm_runtime_put_sync() and device should be disabled at this moment. > > Also, note that ti_qspi_setup() will be called for each SPI device > attached to SPI master and further PM management of SPI master is > performed by SPI core from __spi_pump_messages(). all right, do you want to send a patch fixing it ? -- balbi
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