From 870f81bd28f20e1b2290d83db9fe93ea8f52ba63 Mon Sep 17 00:00:00 2001 From: Bhaumik Bhatt Date: Tue, 29 Sep 2020 23:22:04 +0530 Subject: bus: mhi: core: Trigger host resume if suspended during mhi_device_get() It is possible that the host may be suspending or suspended and may not allow an outgoing device wake assert immediately if a client has requested for it. Ensure that the host wakes up and allows for it so the client does not have to wait for an external trigger or an outgoing packet to be queued for the host resume to occur. Reviewed-by: Manivannan Sadhasivam Signed-off-by: Bhaumik Bhatt Signed-off-by: Manivannan Sadhasivam Link: https://lore.kernel.org/r/20200929175218.8178-6-manivannan.sadhasivam@linaro.org Signed-off-by: Greg Kroah-Hartman --- drivers/bus/mhi/core/pm.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/bus/mhi') diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c index b227d415e937..27bb471c8f4e 100644 --- a/drivers/bus/mhi/core/pm.c +++ b/drivers/bus/mhi/core/pm.c @@ -1112,6 +1112,9 @@ void mhi_device_get(struct mhi_device *mhi_dev) mhi_dev->dev_wake++; read_lock_bh(&mhi_cntrl->pm_lock); + if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state)) + mhi_trigger_resume(mhi_cntrl); + mhi_cntrl->wake_get(mhi_cntrl, true); read_unlock_bh(&mhi_cntrl->pm_lock); } -- cgit v1.2.3-58-ga151