On Mon, Nov 22, 2021 at 06:15:54PM -0600, Alex Elder wrote:
> We currently maintain a "disabled" Boolean flag to determine whether
> the "ipa-setup-ready" SMP2P IRQ handler does anything. That flag
> must be accessed under protection of a mutex.
>
> Instead, disable the SMP2P interrupt when requested, which prevents
> the interrupt handler from ever being called. More importantly, it
> synchronizes a thread disabling the interrupt with the completion of
> the interrupt handler in case they run concurrently.
>
> Use the IPA setup_complete flag rather than the disabled flag in the
> handler to determine whether to ignore any interrupts arriving after
> the first.
>
> Rename the "disabled" flag to be "setup_disabled", to be specific
> about its purpose.
>
> Fixes: 530f9216a953 ("soc: qcom: ipa: AP/modem communications")
> Signed-off-by: Alex Elder <elder@xxxxxxxxxx>
I don't claim to know much about IPA, but this looks reasonable to me.
Reviewed-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
