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mhi: core: Check for pm error state before asserting dev wake

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After calling remove call back in mhi_pm_disable_transition
there is possibility of MHI client calling mhi_device_get_sync
which increments dev wake. This results in to MHI ASSERT due
to non zero dev wake count. Fix this issue by checking pm error
state before incrementing dev wake count.

Change-Id: I817d571f210b77aef444a7ae1f9b2cc5af057ab2
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>
This commit is contained in:
Hemant Kumar 2020-03-13 12:58:16 -07:00 • committed by Gerrit - the friendly Code Review server
commit c006fd5f9f
1 changed files with 5 additions and 0 deletions
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5
drivers/bus/mhi/core/mhi_pm.c
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@ -1493,6 +1493,11 @@ int __mhi_device_get_sync(struct mhi_controller *mhi_cntrl)
int ret;
read_lock_bh(&mhi_cntrl->pm_lock);
if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) {
read_unlock_bh(&mhi_cntrl->pm_lock);
return -EIO;
}
mhi_cntrl->wake_get(mhi_cntrl, true);
if (MHI_PM_IN_SUSPEND_STATE(mhi_cntrl->pm_state))
mhi_trigger_resume(mhi_cntrl);