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| author | Jeffrey Hugo <jhugo@codeaurora.org> | 2020-05-01 00:35:51 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-05 16:58:35 +0200 |
| commit | ce312258084ea0c828e11c831c7b9e8b42b02ef8 (patch) | |
| tree | 00e3f895952437f577283a78097074228e011c95 /drivers | |
| parent | 115f32512f13c0280161908e9de45a97a87673bb (diff) | |
| download | lwn-ce312258084ea0c828e11c831c7b9e8b42b02ef8.tar.gz lwn-ce312258084ea0c828e11c831c7b9e8b42b02ef8.zip | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/bus/mhi/core/pm.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c index 52690cb5c89c..dc83d65f7784 100644 --- a/drivers/bus/mhi/core/pm.c +++ b/drivers/bus/mhi/core/pm.c @@ -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); |