diff options
Diffstat (limited to 'drivers/bus')
| -rw-r--r-- | drivers/bus/mhi/core/pm.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c index adb0e80974f1..fbe944730401 100644 --- a/drivers/bus/mhi/core/pm.c +++ b/drivers/bus/mhi/core/pm.c @@ -1134,6 +1134,7 @@ error_setup_irq: mhi_deinit_dev_ctxt(mhi_cntrl); error_dev_ctxt: + mhi_cntrl->pm_state = MHI_PM_DISABLE; mutex_unlock(&mhi_cntrl->pm_mutex); return ret; @@ -1145,12 +1146,19 @@ void mhi_power_down(struct mhi_controller *mhi_cntrl, bool graceful) enum mhi_pm_state cur_state, transition_state; struct device *dev = &mhi_cntrl->mhi_dev->dev; + mutex_lock(&mhi_cntrl->pm_mutex); + write_lock_irq(&mhi_cntrl->pm_lock); + cur_state = mhi_cntrl->pm_state; + if (cur_state == MHI_PM_DISABLE) { + write_unlock_irq(&mhi_cntrl->pm_lock); + mutex_unlock(&mhi_cntrl->pm_mutex); + return; /* Already powered down */ + } + /* If it's not a graceful shutdown, force MHI to linkdown state */ transition_state = (graceful) ? MHI_PM_SHUTDOWN_PROCESS : MHI_PM_LD_ERR_FATAL_DETECT; - mutex_lock(&mhi_cntrl->pm_mutex); - write_lock_irq(&mhi_cntrl->pm_lock); cur_state = mhi_tryset_pm_state(mhi_cntrl, transition_state); if (cur_state != transition_state) { dev_err(dev, "Failed to move to state: %s from: %s\n", |