diff options
| -rw-r--r-- | drivers/bus/mhi/ep/internal.h | 1 | ||||
| -rw-r--r-- | drivers/bus/mhi/ep/main.c | 20 | ||||
| -rw-r--r-- | drivers/bus/mhi/ep/sm.c | 11 |
3 files changed, 30 insertions, 2 deletions
diff --git a/drivers/bus/mhi/ep/internal.h b/drivers/bus/mhi/ep/internal.h index 4f2e26841702..d201d755560c 100644 --- a/drivers/bus/mhi/ep/internal.h +++ b/drivers/bus/mhi/ep/internal.h @@ -211,5 +211,6 @@ int mhi_ep_set_mhi_state(struct mhi_ep_cntrl *mhi_cntrl, enum mhi_state mhi_stat int mhi_ep_set_m0_state(struct mhi_ep_cntrl *mhi_cntrl); int mhi_ep_set_m3_state(struct mhi_ep_cntrl *mhi_cntrl); int mhi_ep_set_ready_state(struct mhi_ep_cntrl *mhi_cntrl); +void mhi_ep_handle_syserr(struct mhi_ep_cntrl *mhi_cntrl); #endif diff --git a/drivers/bus/mhi/ep/main.c b/drivers/bus/mhi/ep/main.c index d36708d43eb6..706473ea4918 100644 --- a/drivers/bus/mhi/ep/main.c +++ b/drivers/bus/mhi/ep/main.c @@ -516,6 +516,26 @@ static void mhi_ep_reset_worker(struct work_struct *work) } } +/* + * We don't need to do anything special other than setting the MHI SYS_ERR + * state. The host will reset all contexts and issue MHI RESET so that we + * could also recover from error state. + */ +void mhi_ep_handle_syserr(struct mhi_ep_cntrl *mhi_cntrl) +{ + struct device *dev = &mhi_cntrl->mhi_dev->dev; + int ret; + + ret = mhi_ep_set_mhi_state(mhi_cntrl, MHI_STATE_SYS_ERR); + if (ret) + return; + + /* Signal host that the device went to SYS_ERR state */ + ret = mhi_ep_send_state_change_event(mhi_cntrl, MHI_STATE_SYS_ERR); + if (ret) + dev_err(dev, "Failed sending SYS_ERR state change event: %d\n", ret); +} + int mhi_ep_power_up(struct mhi_ep_cntrl *mhi_cntrl) { struct device *dev = &mhi_cntrl->mhi_dev->dev; diff --git a/drivers/bus/mhi/ep/sm.c b/drivers/bus/mhi/ep/sm.c index ffc02f5d0a0d..e3865b85399d 100644 --- a/drivers/bus/mhi/ep/sm.c +++ b/drivers/bus/mhi/ep/sm.c @@ -68,8 +68,10 @@ int mhi_ep_set_m0_state(struct mhi_ep_cntrl *mhi_cntrl) ret = mhi_ep_set_mhi_state(mhi_cntrl, MHI_STATE_M0); spin_unlock_bh(&mhi_cntrl->state_lock); - if (ret) + if (ret) { + mhi_ep_handle_syserr(mhi_cntrl); return ret; + } /* Signal host that the device moved to M0 */ ret = mhi_ep_send_state_change_event(mhi_cntrl, MHI_STATE_M0); @@ -99,8 +101,10 @@ int mhi_ep_set_m3_state(struct mhi_ep_cntrl *mhi_cntrl) ret = mhi_ep_set_mhi_state(mhi_cntrl, MHI_STATE_M3); spin_unlock_bh(&mhi_cntrl->state_lock); - if (ret) + if (ret) { + mhi_ep_handle_syserr(mhi_cntrl); return ret; + } /* Signal host that the device moved to M3 */ ret = mhi_ep_send_state_change_event(mhi_cntrl, MHI_STATE_M3); @@ -132,5 +136,8 @@ int mhi_ep_set_ready_state(struct mhi_ep_cntrl *mhi_cntrl) ret = mhi_ep_set_mhi_state(mhi_cntrl, MHI_STATE_READY); spin_unlock_bh(&mhi_cntrl->state_lock); + if (ret) + mhi_ep_handle_syserr(mhi_cntrl); + return ret; } |