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Commit 9d1744bd authored by Veerabhadrarao Badiganti's avatar Veerabhadrarao Badiganti Committed by Gerrit - the friendly Code Review server
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msm: mhi_dev: Defer mhi resume till M0 ack is sent 



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: default avatarVeerabhadrarao Badiganti <vbadigan@codeaurora.org>
parent fffc7785

drivers/platform/msm/mhi_dev/mhi_sm.c

+20 −10
Original line number Diff line number Diff line
@@ -519,12 +519,6 @@ static int mhi_sm_prepare_resume(void) 
			}

		}



		res = mhi_dev_resume(mhi_sm_ctx->mhi_dev);

		if (res) {

			MHI_SM_ERR("Failed resuming mhi core: %d", res);

			goto exit;

		}



		res = ipa_mhi_resume();

		if (res) {

			MHI_SM_ERR("Failed resuming ipa_mhi:%d", res);
@@ -545,8 +539,24 @@ static int mhi_sm_prepare_resume(void) 
		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);

			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;

		}

	}