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bus: mhi: core: Make sure to powerdown if mhi_sync_power_up fails 

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>
Reviewed-by: Hemant Kumar <hemantk@codeaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20200430190555.32741-3-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jeffrey Hugo 2020-05-01 00:35:51 +05:30 committed by Greg Kroah-Hartman
parent 115f32512f
commit ce31225808
1 changed files with 5 additions and 1 deletions
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6
drivers/bus/mhi/core/pm.c
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@ -902,7 +902,11 @@ 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);