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Subject[PATCH v2 2/5] bus: mhi: core: Make sure to powerdown if mhi_sync_power_up fails
Date
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@codeaurora.org>
---
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 3285c9e..fbffc6b 100644
--- a/drivers/bus/mhi/core/pm.c
+++ b/drivers/bus/mhi/core/pm.c
@@ -922,7 +922,11 @@ 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 : -EIO;
+ if (ret)
+ mhi_power_down(mhi_cntrl, false);
+
+ return ret;
}
EXPORT_SYMBOL(mhi_sync_power_up);

--
Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.
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