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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@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
33a153100b