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

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

Change-Id: I796e22797d91fba69e258addd0a73b04a7146d80
Signed-off-by: Vivek Pernamitta <vpernami@codeaurora.org>
This commit is contained in:
Vivek Pernamitta 2020-12-09 00:44:06 +05:30
commit cf9bb7d795
1 changed files with 7 additions and 0 deletions
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7
drivers/bus/mhi/core/mhi_pm.c
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@ -1517,6 +1517,13 @@ 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");
return -EIO;
}
if (mhi_get_exec_env(mhi_cntrl) == MHI_EE_RDDM &&
!mhi_cntrl->power_down) {
mhi_cntrl->ee = MHI_EE_RDDM;