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authorBhaumik Bhatt <bbhatt@codeaurora.org>2020-11-09 12:47:27 -0800
committerManivannan Sadhasivam <manivannan.sadhasivam@linaro.org>2020-11-18 15:20:34 +0530
commitdc53d862eab89000ebc87240274943793f0af682 (patch)
tree61f33be0e52e20cdbd52a1f308ecbdce3b899457 /drivers/bus
parentfaa257075bcc35e2c2ee68eb83e4e53d3bb02a90 (diff)
bus: mhi: core: Move to an error state on mission mode failure
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>
Diffstat (limited to 'drivers/bus')
-rw-r--r--drivers/bus/mhi/core/pm.c8
1 files changed, 6 insertions, 2 deletions
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);