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Commit 2e15b77b authored by Vivek Pernamitta's avatar Vivek Pernamitta
Browse files

mhi: core: Check PCIe link status before accessing MHI registers 



Check PCIE link status before accessing MHI registers at DRV
resume to overcome NOC error.

Change-Id: I796e22797d91fba69e258addd0a73b04a7146d80
Signed-off-by: default avatarVivek Pernamitta <vpernami@codeaurora.org>
parent 38055361

drivers/bus/mhi/core/mhi_pm.c

+9 −0
Original line number Diff line number Diff line
@@ -1511,6 +1511,15 @@ int mhi_pm_fast_resume(struct mhi_controller *mhi_cntrl, bool notify_client) 
	}



	if (mhi_cntrl->rddm_supported) {



		/* check EP is in proper state */

		if (mhi_cntrl->link_status(mhi_cntrl, mhi_cntrl->priv_data)) {

			MHI_ERR("Unable to access EP Config space\n");

			write_unlock_irq(&mhi_cntrl->pm_lock);

			tasklet_enable(&mhi_cntrl->mhi_event->task);

			return -ETIMEDOUT;

		}



		if (mhi_get_exec_env(mhi_cntrl) == MHI_EE_RDDM &&

		    !mhi_cntrl->power_down) {

			mhi_cntrl->ee = MHI_EE_RDDM;