[PATCH 102/379][SRU][OEM-5.6] bus: mhi: core: Make sure to powerdown if mhi_sync_power_up fails

[You-Sheng Yang]

From: Jeffrey Hugo <jhugo at codeaurora.org>

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

Powerdown is necessary if mhi_sync_power_up fails due to a timeout, to
clean up the resources.  Otherwise a BUG could be triggered when
attempting to clean up MSIs because the IRQ is still active from a
request_irq().

Signed-off-by: Jeffrey Hugo <jhugo at codeaurora.org>
Reviewed-by: Hemant Kumar <hemantk at codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam at linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam at linaro.org>
Link: https://lore.kernel.org/r/20200430190555.32741-3-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
(cherry picked from commit ce312258084ea0c828e11c831c7b9e8b42b02ef8)
Signed-off-by: You-Sheng Yang <vicamo.yang at canonical.com>
---
 drivers/bus/mhi/core/pm.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c
index 3529419d076b..e7c831867a23 100644
--- a/drivers/bus/mhi/core/pm.c
+++ b/drivers/bus/mhi/core/pm.c
@@ -1045,7 +1045,11 @@ int mhi_sync_power_up(struct mhi_controller *mhi_cntrl)
 			   MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state),
 			   msecs_to_jiffies(mhi_cntrl->timeout_ms));
 
-	return (MHI_IN_MISSION_MODE(mhi_cntrl->ee)) ? 0 : -EIO;
+	ret = (MHI_IN_MISSION_MODE(mhi_cntrl->ee)) ? 0 : -ETIMEDOUT;
+	if (ret)
+		mhi_power_down(mhi_cntrl, false);
+
+	return ret;
 }
 EXPORT_SYMBOL(mhi_sync_power_up);
 
-- 
2.29.2