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msm: mhi_dev: Defer mhi resume till M0 ack is sent

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Defer mhi resume till M0 ack is notified to host.
This is to ensure no outstanding transfer completion events are
send to host before M0 ack.

Change-Id: Ia10fabc554b1cdef14a0771012b9ffea68851e25
Signed-off-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>
Signed-off-by: Rama Krishna Phani A <rphani@codeaurora.org>
This commit is contained in:
Veerabhadrarao Badiganti 2021-04-12 12:37:04 +05:30 committed by Rama Krishna Phani A
parent 456b6201e2
commit af4493526f
1 changed files with 20 additions and 13 deletions
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33
drivers/platform/msm/mhi_dev/mhi_sm.c
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@ -515,15 +515,6 @@ static int mhi_sm_prepare_resume(void)
return res;
}
}
res = mhi_dev_resume(mhi_sm_ctx->mhi_dev);
if (res) {
MHI_SM_ERR("Failed resuming mhi core: %d", res);
goto exit;
}
if (mhi_sm_ctx->mhi_dev->use_ipa) {
res = ipa_mhi_resume();
if (res) {
MHI_SM_ERR("Failed resuming ipa_mhi:%d", res);
@ -545,11 +536,27 @@ static int mhi_sm_prepare_resume(void)
/* Send state change notification only if we were in M3 state */
res = mhi_dev_send_state_change_event(mhi_sm_ctx->mhi_dev,
MHI_DEV_M0_STATE);
if (res) {
MHI_SM_ERR("Failed to send event %s to host, returned %d\n",
mhi_sm_dev_event_str(MHI_DEV_EVENT_M0_STATE), res);
goto exit;
if (res) {
MHI_SM_ERR("Failed to send event %s to host, ret =%d\n",
mhi_sm_dev_event_str(MHI_DEV_EVENT_M0_STATE),
res);
goto exit;
}
}
/*
* Defer mhi resume till M0 ack is notified to host.
* This is to ensure no outstanding transfer completion events are send
* to host before M0 ack.
*/
if ((old_state == MHI_DEV_M3_STATE) ||
(old_state == MHI_DEV_M2_STATE)) {
res = mhi_dev_resume(mhi_sm_ctx->mhi_dev);
if (res) {
MHI_SM_ERR("Failed resuming mhi core, returned %d",
res);
goto exit;
}
}
if (old_state == MHI_DEV_READY_STATE) {