usb: tegra: otg: fix unbalanced suspend/resume

Becasue of a previous workaround, suspend/resume pair is implemented as
suspend/complete pair in the driver's dev_pm_ops field.

If any driver suspend routine (which is called before otg suspend)
failed, then tegra_otg_resume() will be called even tegra_otg_suspend()
is not called. This will cause disable the OTG clock, and OTG will not
generate any more IRQ.

Ideal fix would be use suspend/resume pair to implement the dev_pm_ops,
but this might break previous workaround. This patch check suspend()
routine is called or not in the resume routine; even we use suspend/
resume pair in the future, it will not cause bad behaviour.

BUG 999759

Change-Id: I88f9c28bb76c5ff9e32917904017f291456cb933
Signed-off-by: Xin Xie <xxie@nvidia.com>
Reviewed-on: http://git-master/r/108444
(cherry picked from commit c751aeea65f126d8e2df7f8a9ba02a631f958dc1)
Reviewed-on: http://git-master/r/108945
Reviewed-by: Lokesh Pathak <lpathak@nvidia.com>
Tested-by: Lokesh Pathak <lpathak@nvidia.com>

0 files changed, 0 insertions, 0 deletions