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[20/29] bus: mhi: core: Move to an error state on mission mode failure

Message ID 20201202094159.107075-21-manivannan.sadhasivam@linaro.org
State Accepted
Commit dc53d862eab89000ebc87240274943793f0af682
Headers show
Series MHI changes for v5.11 | expand

Commit Message

Manivannan Sadhasivam Dec. 2, 2020, 9:41 a.m. UTC 
From: Bhaumik Bhatt <bbhatt@codeaurora.org>


If the host receives a mission mode event and by the time it can get
to processing it, the register accesses fail implying a connectivity
error, MHI should move to an error state. This helps avoid longer wait
times from a synchronous power up perspective and accurately reflects
the MHI execution environment and power management states.

Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

---
 drivers/bus/mhi/core/pm.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

-- 
2.25.1
diff mbox series

Patch

diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c
index 029919647002..06adea2580d2 100644
--- a/drivers/bus/mhi/core/pm.c
+++ b/drivers/bus/mhi/core/pm.c
@@ -383,10 +383,14 @@  static int mhi_pm_mission_mode_transition(struct mhi_controller *mhi_cntrl)
 	write_lock_irq(&mhi_cntrl->pm_lock);
 	if (MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state))
 		mhi_cntrl->ee = mhi_get_exec_env(mhi_cntrl);
-	write_unlock_irq(&mhi_cntrl->pm_lock);
 
-	if (!MHI_IN_MISSION_MODE(mhi_cntrl->ee))
+	if (!MHI_IN_MISSION_MODE(mhi_cntrl->ee)) {
+		mhi_cntrl->pm_state = MHI_PM_LD_ERR_FATAL_DETECT;
+		write_unlock_irq(&mhi_cntrl->pm_lock);
+		wake_up_all(&mhi_cntrl->state_event);
 		return -EIO;
+	}
+	write_unlock_irq(&mhi_cntrl->pm_lock);
 
 	wake_up_all(&mhi_cntrl->state_event);