diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c index 27bb471c8f4e..ce4d969818b4 100644 --- a/drivers/bus/mhi/core/pm.c +++ b/drivers/bus/mhi/core/pm.c @@ -256,6 +256,7 @@ int mhi_pm_m0_transition(struct mhi_controller *mhi_cntrl) dev_err(dev, "Unable to transition to M0 state\n"); return -EIO; } + mhi_cntrl->M0++; /* Wake up the device */ read_lock_bh(&mhi_cntrl->pm_lock); @@ -326,6 +327,8 @@ void mhi_pm_m1_transition(struct mhi_controller *mhi_cntrl) mhi_cntrl->dev_state = MHI_STATE_M2; write_unlock_irq(&mhi_cntrl->pm_lock); + + mhi_cntrl->M2++; wake_up_all(&mhi_cntrl->state_event); /* If there are any pending resources, exit M2 immediately */ @@ -362,6 +365,7 @@ int mhi_pm_m3_transition(struct mhi_controller *mhi_cntrl) return -EIO; } + mhi_cntrl->M3++; wake_up_all(&mhi_cntrl->state_event); return 0; diff --git a/include/linux/mhi.h b/include/linux/mhi.h index bb337d163dda..c56b4447a4e9 100644 --- a/include/linux/mhi.h +++ b/include/linux/mhi.h @@ -328,6 +328,7 @@ struct mhi_controller_config { * @dev_state: MHI device state * @dev_wake: Device wakeup count * @pending_pkts: Pending packets for the controller + * @M0, M2, M3: Counters to track number of device MHI state changes * @transition_list: List of MHI state transitions * @transition_lock: Lock for protecting MHI state transition list * @wlock: Lock for protecting device wakeup @@ -407,6 +408,7 @@ struct mhi_controller { enum mhi_state dev_state; atomic_t dev_wake; atomic_t pending_pkts; + u32 M0, M2, M3; struct list_head transition_list; spinlock_t transition_lock; spinlock_t wlock;