diff mbox series

[339/379,SRU,OEM-5.6] bus: mhi: core: Trigger host resume if suspended during mhi_device_get()

Message ID 20201223085152.554896-340-vicamo.yang@canonical.com
State Accepted
Headers show
Series Support Qualcomm QCA6390 via ath11k driver | expand

Commit Message

You-Sheng Yang Dec. 23, 2020, 8:51 a.m. UTC 
From: Bhaumik Bhatt <bbhatt@codeaurora.org>

BugLink: https://bugs.launchpad.net/bugs/1879633

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 <manivannan.sadhasivam@linaro.org>
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200929175218.8178-6-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 870f81bd28f20e1b2290d83db9fe93ea8f52ba63)
Signed-off-by: You-Sheng Yang <vicamo.yang@canonical.com>
---
 drivers/bus/mhi/core/pm.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

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);
 }