Two places call ipa_setup(). The first, ipa_probe(), holds an IPA
clock reference when calling ipa_setup() (if the AP is responsible
for IPA firmware loading). But if the modem is loading IPA
firmware, ipa_smp2p_modem_setup_ready_isr() calls ipa_setup() after
the modem has signaled the hardware is ready. This can happen at
any time, and there is no guarantee the hardware is active.
Have ipa_smp2p_modem_setup() take an IPA clock reference before it
calls ipa_setup(), and release it once setup is complete.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
if (!smp2p->disabled) {
int ret;
+ /* The clock needs to be active for setup */
+ ipa_clock_get(smp2p->ipa);
+
ret = ipa_setup(smp2p->ipa);
if (ret)
dev_err(&smp2p->ipa->pdev->dev,
"error %d from ipa_setup()\n", ret);
smp2p->disabled = true;
+
+ ipa_clock_put(smp2p->ipa);
}
mutex_unlock(&smp2p->mutex);