* Andreas Kemnade <andreas@xxxxxxxxxxxx> [160822 12:25]:
> setting twl->linkstat = MUSB_UNKNOWN upon error in musb_mailbox as
> introduced in
> commit 12b7db2bf8b8 ("usb: musb: Return error value from musb_mailbox")
> causes twl4030_usb_irq() to not detect a state change form cable connected
> to cable disconnected after such an error so that
> pm_runtime_put_autosuspend() will not be called and the usage counter
> gets unbalanced. Such errors happen e.g. if the omap2430 module is not
> (yet) loaded during plug/unplug events.
>
> This patch introduces a flag instead that indicates whether there is
> information for the musb_mailbox pending and calls musb_mailbox() if
> that flag is set.
Still works for me for PM:
Tested-by: Tony Lindgren <tony@xxxxxxxxxxx>
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